<?php
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: google/cloud/retail/v2/product.proto

namespace Google\Cloud\Retail\V2;

use Google\Protobuf\Internal\GPBType;
use Google\Protobuf\Internal\RepeatedField;
use Google\Protobuf\Internal\GPBUtil;

/**
 * Product captures all metadata information of items to be recommended or
 * searched.
 *
 * Generated from protobuf message <code>google.cloud.retail.v2.Product</code>
 */
class Product extends \Google\Protobuf\Internal\Message
{
    /**
     * Immutable. Full resource name of the product, such as
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id`.
     *
     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
     */
    private $name = '';
    /**
     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
     * the final component of [name][google.cloud.retail.v2.Product.name]. For
     * example, this field is "id_1", if
     * [name][google.cloud.retail.v2.Product.name] is
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1`.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
     * property [Product.sku](https://schema.org/sku).
     *
     * Generated from protobuf field <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
     */
    private $id = '';
    /**
     * Immutable. The type of the product. Default to
     * [Catalog.product_level_config.ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
     * if unset.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];</code>
     */
    private $type = 0;
    /**
     * Variant group identifier. Must be an
     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
     * this product. Otherwise, an error is thrown.
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
     * set to the same value as [id][google.cloud.retail.v2.Product.id].
     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
     * be empty. A maximum of 2,000 products are allowed to share the same
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
     * error is returned.
     * Corresponding properties: Google Merchant Center property
     * [item_group_id](https://support.google.com/merchants/answer/6324507).
     * Schema.org property
     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
     *
     * Generated from protobuf field <code>string primary_product_id = 4;</code>
     */
    private $primary_product_id = '';
    /**
     * The [id][google.cloud.retail.v2.Product.id] of the collection members when
     * [type][google.cloud.retail.v2.Product.type] is
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION].
     * Non-existent product ids are allowed.
     * The [type][google.cloud.retail.v2.Product.type] of the members must be
     * either [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] or
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT] otherwise and
     * INVALID_ARGUMENT error is thrown. Should not set it for other types. A
     * maximum of 1000 values are allowed. Otherwise, an INVALID_ARGUMENT error is
     * return.
     *
     * Generated from protobuf field <code>repeated string collection_member_ids = 5;</code>
     */
    private $collection_member_ids;
    /**
     * The Global Trade Item Number (GTIN) of the product.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This field must be a Unigram. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Corresponding properties: Google Merchant Center property
     * [gtin](https://support.google.com/merchants/answer/6324461).
     * Schema.org property
     * [Product.isbn](https://schema.org/isbn),
     * [Product.gtin8](https://schema.org/gtin8),
     * [Product.gtin12](https://schema.org/gtin12),
     * [Product.gtin13](https://schema.org/gtin13), or
     * [Product.gtin14](https://schema.org/gtin14).
     * If the value is not a valid GTIN, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>string gtin = 6;</code>
     */
    private $gtin = '';
    /**
     * Product categories. This field is repeated for supporting one product
     * belonging to several parallel categories. Strongly recommended using the
     * full path for better search / recommendation quality.
     * To represent full path of category, use '>' sign to separate different
     * hierarchies. If '>' is part of the category name, please replace it with
     * other character(s).
     * For example, if a shoes product belongs to both
     * ["Shoes & Accessories" -> "Shoes"] and
     * ["Sports & Fitness" -> "Athletic Clothing" -> "Shoes"], it could be
     * represented as:
     *      "categories": [
     *        "Shoes & Accessories > Shoes",
     *        "Sports & Fitness > Athletic Clothing > Shoes"
     *      ]
     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
     * error is returned.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
     * Each value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [google_product_category][mc_google_product_category]. Schema.org property
     * [Product.category] (https://schema.org/category).
     * [mc_google_product_category]:
     * https://support.google.com/merchants/answer/6324436
     *
     * Generated from protobuf field <code>repeated string categories = 7;</code>
     */
    private $categories;
    /**
     * Required. Product title.
     * This field must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
     * property [Product.name](https://schema.org/name).
     *
     * Generated from protobuf field <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
     */
    private $title = '';
    /**
     * The brands of the product.
     * A maximum of 30 brands are allowed. Each brand must be a UTF-8 encoded
     * string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [brand](https://support.google.com/merchants/answer/6324351). Schema.org
     * property [Product.brand](https://schema.org/brand).
     *
     * Generated from protobuf field <code>repeated string brands = 9;</code>
     */
    private $brands;
    /**
     * Product description.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [description](https://support.google.com/merchants/answer/6324468).
     * Schema.org property [Product.description](https://schema.org/description).
     *
     * Generated from protobuf field <code>string description = 10;</code>
     */
    private $description = '';
    /**
     * Language of the title/description and other string attributes. Use language
     * tags defined by [BCP 47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt).
     * For product prediction, this field is ignored and the model automatically
     * detects the text language. The [Product][google.cloud.retail.v2.Product]
     * can include text in different languages, but duplicating
     * [Product][google.cloud.retail.v2.Product]s to provide text in multiple
     * languages can result in degraded model performance.
     * For product search this field is in use. It defaults to "en-US" if unset.
     *
     * Generated from protobuf field <code>string language_code = 11;</code>
     */
    private $language_code = '';
    /**
     * Highly encouraged. Extra product attributes to be included. For example,
     * for products, this could include the store name, vendor, style, color, etc.
     * These are very strong signals for recommendation model, thus we highly
     * recommend providing the attributes here.
     * Features that can take on one of a limited number of possible values. Two
     * types of features can be set are:
     * Textual features. some examples would be the brand/maker of a product, or
     * country of a customer. Numerical features. Some examples would be the
     * height/weight of a product, or age of a customer.
     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
     * }`.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * Max entries count: 200.
     * * The key must be a UTF-8 encoded string with a length limit of 128
     *   characters.
     * * For indexable attribute, the key must match the pattern:
     *   `[a-zA-Z0-9][a-zA-Z0-9_]*`. For example, `key0LikeThis` or
     *   `KEY_1_LIKE_THIS`.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a non-empty UTF-8 encoded string with a
     *   length limit of 256 characters.
     * * For number attributes, at most 400 values are allowed.
     *
     * Generated from protobuf field <code>map<string, .google.cloud.retail.v2.CustomAttribute> attributes = 12;</code>
     */
    private $attributes;
    /**
     * Custom tags associated with the product.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
     * encoded string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * This tag can be used for filtering recommendation results by passing the
     * tag as part of the
     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
     * Corresponding properties: Google Merchant Center property
     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
     *
     * Generated from protobuf field <code>repeated string tags = 13;</code>
     */
    private $tags;
    /**
     * Product price and cost information.
     * Corresponding properties: Google Merchant Center property
     * [price](https://support.google.com/merchants/answer/6324371).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
     */
    private $price_info = null;
    /**
     * The rating of this product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Rating rating = 15;</code>
     */
    private $rating = null;
    /**
     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
     * available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp available_time = 18;</code>
     */
    private $available_time = null;
    /**
     * The online availability of the [Product][google.cloud.retail.v2.Product].
     * Default to
     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
     * Corresponding properties: Google Merchant Center property
     * [availability](https://support.google.com/merchants/answer/6324448).
     * Schema.org property [Offer.availability](https://schema.org/availability).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
     */
    private $availability = 0;
    /**
     * The available quantity of the item.
     *
     * Generated from protobuf field <code>.google.protobuf.Int32Value available_quantity = 20;</code>
     */
    private $available_quantity = null;
    /**
     * Fulfillment information, such as the store IDs for in-store pickup or
     * region IDs for different shipping methods.
     * All the elements must have distinct
     * [FulfillmentInfo.type][google.cloud.retail.v2.FulfillmentInfo.type].
     * Otherwise, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.FulfillmentInfo fulfillment_info = 21;</code>
     */
    private $fulfillment_info;
    /**
     * Canonical URL directly linking to the product detail page.
     * It is strongly recommended to provide a valid uri for the product,
     * otherwise the service performance could be significantly degraded.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
     * property [Offer.url](https://schema.org/url).
     *
     * Generated from protobuf field <code>string uri = 22;</code>
     */
    private $uri = '';
    /**
     * Product images for the product. We highly recommend putting the main
     * image first.
     * A maximum of 300 images are allowed.
     * Corresponding properties: Google Merchant Center property
     * [image_link](https://support.google.com/merchants/answer/6324350).
     * Schema.org property [Product.image](https://schema.org/image).
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
     */
    private $images;
    /**
     * The target group associated with a given audience (e.g. male, veterans,
     * car owners, musicians, etc.) of the product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Audience audience = 24;</code>
     */
    private $audience = null;
    /**
     * The color of the product.
     * Corresponding properties: Google Merchant Center property
     * [color](https://support.google.com/merchants/answer/6324487). Schema.org
     * property [Product.color](https://schema.org/color).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.ColorInfo color_info = 25;</code>
     */
    private $color_info = null;
    /**
     * The size of the product. To represent different size systems or size types,
     * consider using this format: [[[size_system:]size_type:]size_value].
     * For example, in "US:MENS:M", "US" represents size system; "MENS" represents
     * size type; "M" represents size value. In "GIRLS:27", size system is empty;
     * "GIRLS" represents size type; "27" represents size value. In "32 inches",
     * both size system and size type are empty, while size value is "32 inches".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [size](https://support.google.com/merchants/answer/6324492),
     * [size_type](https://support.google.com/merchants/answer/6324497), and
     * [size_system](https://support.google.com/merchants/answer/6324502).
     * Schema.org property [Product.size](https://schema.org/size).
     *
     * Generated from protobuf field <code>repeated string sizes = 26;</code>
     */
    private $sizes;
    /**
     * The material of the product. For example, "leather", "wooden".
     * A maximum of 20 values are allowed. Each value must be a UTF-8 encoded
     * string with a length limit of 200 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [material](https://support.google.com/merchants/answer/6324410). Schema.org
     * property [Product.material](https://schema.org/material).
     *
     * Generated from protobuf field <code>repeated string materials = 27;</code>
     */
    private $materials;
    /**
     * The pattern or graphic print of the product. For example, "striped", "polka
     * dot", "paisley".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [pattern](https://support.google.com/merchants/answer/6324483). Schema.org
     * property [Product.pattern](https://schema.org/pattern).
     *
     * Generated from protobuf field <code>repeated string patterns = 28;</code>
     */
    private $patterns;
    /**
     * The condition of the product. Strongly encouraged to use the standard
     * values: "new", "refurbished", "used".
     * A maximum of 1 value is allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [condition](https://support.google.com/merchants/answer/6324469).
     * Schema.org property
     * [Offer.itemCondition](https://schema.org/itemCondition).
     *
     * Generated from protobuf field <code>repeated string conditions = 29;</code>
     */
    private $conditions;
    /**
     * The promotions applied to the product. A maximum of 10 values are allowed
     * per [Product][google.cloud.retail.v2.Product]. Only
     * [Promotion.promotion_id][google.cloud.retail.v2.Promotion.promotion_id]
     * will be used, other fields will be ignored if set.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Promotion promotions = 34;</code>
     */
    private $promotions;
    /**
     * The timestamp when the product is published by the retailer for the first
     * time, which indicates the freshness of the products. Note that this field
     * is different from
     * [available_time][google.cloud.retail.v2.Product.available_time], given it
     * purely describes product freshness regardless of when it is available on
     * search and recommendation.
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp publish_time = 33;</code>
     */
    private $publish_time = null;
    /**
     * Indicates which fields in the [Product][google.cloud.retail.v2.Product]s
     * are returned in [SearchResponse][google.cloud.retail.v2.SearchResponse].
     * Supported fields for all [type][google.cloud.retail.v2.Product.type]s:
     * * [audience][google.cloud.retail.v2.Product.audience]
     * * [availability][google.cloud.retail.v2.Product.availability]
     * * [brands][google.cloud.retail.v2.Product.brands]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * * [conditions][google.cloud.retail.v2.Product.conditions]
     * * [gtin][google.cloud.retail.v2.Product.gtin]
     * * [materials][google.cloud.retail.v2.Product.materials]
     * * [name][google.cloud.retail.v2.Product.name]
     * * [patterns][google.cloud.retail.v2.Product.patterns]
     * * [price_info][google.cloud.retail.v2.Product.price_info]
     * * [rating][google.cloud.retail.v2.Product.rating]
     * * [sizes][google.cloud.retail.v2.Product.sizes]
     * * [title][google.cloud.retail.v2.Product.title]
     * * [uri][google.cloud.retail.v2.Product.uri]
     * Supported fields only for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION]:
     * * [categories][google.cloud.retail.v2.Product.categories]
     * * [description][google.cloud.retail.v2.Product.description]
     * * [images][google.cloud.retail.v2.Product.images]
     * Supported fields only for
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]:
     * * Only the first image in [images][google.cloud.retail.v2.Product.images]
     * To mark [attributes][google.cloud.retail.v2.Product.attributes] as
     * retrievable, include paths of the form "attributes.key" where "key" is the
     * key of a custom attribute, as specified in
     * [attributes][google.cloud.retail.v2.Product.attributes].
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION], the
     * following fields are always returned in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * For [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT], the
     * following fields are always returned in by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * The maximum number of paths is 30. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Note: Returning more fields in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] can increase
     * response payload size and serving latency.
     *
     * Generated from protobuf field <code>.google.protobuf.FieldMask retrievable_fields = 30;</code>
     */
    private $retrievable_fields = null;
    /**
     * Output only. Product variants grouped together on primary product which
     * share similar product attributes. It's automatically grouped by
     * [primary_product_id][google.cloud.retail.v2.Product.primary_product_id] for
     * all the product variants. Only populated for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s.
     * Note: This field is OUTPUT_ONLY for
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct].
     * Do not set this field in API requests.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Product variants = 31 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     */
    private $variants;
    protected $expiration;

    /**
     * Constructor.
     *
     * @param array $data {
     *     Optional. Data for populating the Message object.
     *
     *     @type \Google\Protobuf\Timestamp $expire_time
     *           The timestamp when this product becomes unavailable for
     *           [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     *           If it is set, the [Product][google.cloud.retail.v2.Product] is not
     *           available for
     *           [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     *           [expire_time][google.cloud.retail.v2.Product.expire_time]. However, the
     *           product can still be retrieved by
     *           [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     *           and
     *           [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     *           [expire_time][google.cloud.retail.v2.Product.expire_time] must be later
     *           than [available_time][google.cloud.retail.v2.Product.available_time] and
     *           [publish_time][google.cloud.retail.v2.Product.publish_time], otherwise an
     *           INVALID_ARGUMENT error is thrown.
     *           Corresponding properties: Google Merchant Center property
     *           [expiration_date](https://support.google.com/merchants/answer/6324499).
     *     @type \Google\Protobuf\Duration $ttl
     *           Input only. The TTL (time to live) of the product.
     *           If it is set, it must be a non-negative value, and
     *           [expire_time][google.cloud.retail.v2.Product.expire_time] is set as
     *           current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl]. The
     *           derived [expire_time][google.cloud.retail.v2.Product.expire_time] is
     *           returned in the output and [ttl][google.cloud.retail.v2.Product.ttl] is
     *           left blank when retrieving the [Product][google.cloud.retail.v2.Product].
     *           If it is set, the product is not available for
     *           [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     *           current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl].
     *           However, the product can still be retrieved by
     *           [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     *           and
     *           [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     *     @type string $name
     *           Immutable. Full resource name of the product, such as
     *           `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id`.
     *     @type string $id
     *           Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
     *           the final component of [name][google.cloud.retail.v2.Product.name]. For
     *           example, this field is "id_1", if
     *           [name][google.cloud.retail.v2.Product.name] is
     *           `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1`.
     *           This field must be a UTF-8 encoded string with a length limit of 128
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [id](https://support.google.com/merchants/answer/6324405). Schema.org
     *           property [Product.sku](https://schema.org/sku).
     *     @type int $type
     *           Immutable. The type of the product. Default to
     *           [Catalog.product_level_config.ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
     *           if unset.
     *     @type string $primary_product_id
     *           Variant group identifier. Must be an
     *           [id][google.cloud.retail.v2.Product.id], with the same parent branch with
     *           this product. Otherwise, an error is thrown.
     *           For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     *           [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
     *           set to the same value as [id][google.cloud.retail.v2.Product.id].
     *           For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
     *           be empty. A maximum of 2,000 products are allowed to share the same
     *           [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     *           [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
     *           error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [item_group_id](https://support.google.com/merchants/answer/6324507).
     *           Schema.org property
     *           [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $collection_member_ids
     *           The [id][google.cloud.retail.v2.Product.id] of the collection members when
     *           [type][google.cloud.retail.v2.Product.type] is
     *           [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION].
     *           Non-existent product ids are allowed.
     *           The [type][google.cloud.retail.v2.Product.type] of the members must be
     *           either [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] or
     *           [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT] otherwise and
     *           INVALID_ARGUMENT error is thrown. Should not set it for other types. A
     *           maximum of 1000 values are allowed. Otherwise, an INVALID_ARGUMENT error is
     *           return.
     *     @type string $gtin
     *           The Global Trade Item Number (GTIN) of the product.
     *           This field must be a UTF-8 encoded string with a length limit of 128
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           This field must be a Unigram. Otherwise, an INVALID_ARGUMENT error is
     *           returned.
     *           Corresponding properties: Google Merchant Center property
     *           [gtin](https://support.google.com/merchants/answer/6324461).
     *           Schema.org property
     *           [Product.isbn](https://schema.org/isbn),
     *           [Product.gtin8](https://schema.org/gtin8),
     *           [Product.gtin12](https://schema.org/gtin12),
     *           [Product.gtin13](https://schema.org/gtin13), or
     *           [Product.gtin14](https://schema.org/gtin14).
     *           If the value is not a valid GTIN, an INVALID_ARGUMENT error is returned.
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $categories
     *           Product categories. This field is repeated for supporting one product
     *           belonging to several parallel categories. Strongly recommended using the
     *           full path for better search / recommendation quality.
     *           To represent full path of category, use '>' sign to separate different
     *           hierarchies. If '>' is part of the category name, please replace it with
     *           other character(s).
     *           For example, if a shoes product belongs to both
     *           ["Shoes & Accessories" -> "Shoes"] and
     *           ["Sports & Fitness" -> "Athletic Clothing" -> "Shoes"], it could be
     *           represented as:
     *                "categories": [
     *                  "Shoes & Accessories > Shoes",
     *                  "Sports & Fitness > Athletic Clothing > Shoes"
     *                ]
     *           Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     *           [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
     *           error is returned.
     *           At most 250 values are allowed per
     *           [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
     *           Each value must be a UTF-8 encoded string with a length limit of 5,000
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [google_product_category][mc_google_product_category]. Schema.org property
     *           [Product.category] (https://schema.org/category).
     *           [mc_google_product_category]:
     *           https://support.google.com/merchants/answer/6324436
     *     @type string $title
     *           Required. Product title.
     *           This field must be a UTF-8 encoded string with a length limit of 1,000
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [title](https://support.google.com/merchants/answer/6324415). Schema.org
     *           property [Product.name](https://schema.org/name).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $brands
     *           The brands of the product.
     *           A maximum of 30 brands are allowed. Each brand must be a UTF-8 encoded
     *           string with a length limit of 1,000 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [brand](https://support.google.com/merchants/answer/6324351). Schema.org
     *           property [Product.brand](https://schema.org/brand).
     *     @type string $description
     *           Product description.
     *           This field must be a UTF-8 encoded string with a length limit of 5,000
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [description](https://support.google.com/merchants/answer/6324468).
     *           Schema.org property [Product.description](https://schema.org/description).
     *     @type string $language_code
     *           Language of the title/description and other string attributes. Use language
     *           tags defined by [BCP 47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt).
     *           For product prediction, this field is ignored and the model automatically
     *           detects the text language. The [Product][google.cloud.retail.v2.Product]
     *           can include text in different languages, but duplicating
     *           [Product][google.cloud.retail.v2.Product]s to provide text in multiple
     *           languages can result in degraded model performance.
     *           For product search this field is in use. It defaults to "en-US" if unset.
     *     @type array|\Google\Protobuf\Internal\MapField $attributes
     *           Highly encouraged. Extra product attributes to be included. For example,
     *           for products, this could include the store name, vendor, style, color, etc.
     *           These are very strong signals for recommendation model, thus we highly
     *           recommend providing the attributes here.
     *           Features that can take on one of a limited number of possible values. Two
     *           types of features can be set are:
     *           Textual features. some examples would be the brand/maker of a product, or
     *           country of a customer. Numerical features. Some examples would be the
     *           height/weight of a product, or age of a customer.
     *           For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
     *           "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
     *           }`.
     *           This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     *           error is returned:
     *           * Max entries count: 200.
     *           * The key must be a UTF-8 encoded string with a length limit of 128
     *             characters.
     *           * For indexable attribute, the key must match the pattern:
     *             `[a-zA-Z0-9][a-zA-Z0-9_]*`. For example, `key0LikeThis` or
     *             `KEY_1_LIKE_THIS`.
     *           * For text attributes, at most 400 values are allowed. Empty values are not
     *             allowed. Each value must be a non-empty UTF-8 encoded string with a
     *             length limit of 256 characters.
     *           * For number attributes, at most 400 values are allowed.
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $tags
     *           Custom tags associated with the product.
     *           At most 250 values are allowed per
     *           [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
     *           encoded string with a length limit of 1,000 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           This tag can be used for filtering recommendation results by passing the
     *           tag as part of the
     *           [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
     *           Corresponding properties: Google Merchant Center property
     *           [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
     *     @type \Google\Cloud\Retail\V2\PriceInfo $price_info
     *           Product price and cost information.
     *           Corresponding properties: Google Merchant Center property
     *           [price](https://support.google.com/merchants/answer/6324371).
     *     @type \Google\Cloud\Retail\V2\Rating $rating
     *           The rating of this product.
     *     @type \Google\Protobuf\Timestamp $available_time
     *           The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
     *           available for
     *           [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     *     @type int $availability
     *           The online availability of the [Product][google.cloud.retail.v2.Product].
     *           Default to
     *           [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
     *           Corresponding properties: Google Merchant Center property
     *           [availability](https://support.google.com/merchants/answer/6324448).
     *           Schema.org property [Offer.availability](https://schema.org/availability).
     *     @type \Google\Protobuf\Int32Value $available_quantity
     *           The available quantity of the item.
     *     @type \Google\Cloud\Retail\V2\FulfillmentInfo[]|\Google\Protobuf\Internal\RepeatedField $fulfillment_info
     *           Fulfillment information, such as the store IDs for in-store pickup or
     *           region IDs for different shipping methods.
     *           All the elements must have distinct
     *           [FulfillmentInfo.type][google.cloud.retail.v2.FulfillmentInfo.type].
     *           Otherwise, an INVALID_ARGUMENT error is returned.
     *     @type string $uri
     *           Canonical URL directly linking to the product detail page.
     *           It is strongly recommended to provide a valid uri for the product,
     *           otherwise the service performance could be significantly degraded.
     *           This field must be a UTF-8 encoded string with a length limit of 5,000
     *           characters. Otherwise, an INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [link](https://support.google.com/merchants/answer/6324416). Schema.org
     *           property [Offer.url](https://schema.org/url).
     *     @type \Google\Cloud\Retail\V2\Image[]|\Google\Protobuf\Internal\RepeatedField $images
     *           Product images for the product. We highly recommend putting the main
     *           image first.
     *           A maximum of 300 images are allowed.
     *           Corresponding properties: Google Merchant Center property
     *           [image_link](https://support.google.com/merchants/answer/6324350).
     *           Schema.org property [Product.image](https://schema.org/image).
     *     @type \Google\Cloud\Retail\V2\Audience $audience
     *           The target group associated with a given audience (e.g. male, veterans,
     *           car owners, musicians, etc.) of the product.
     *     @type \Google\Cloud\Retail\V2\ColorInfo $color_info
     *           The color of the product.
     *           Corresponding properties: Google Merchant Center property
     *           [color](https://support.google.com/merchants/answer/6324487). Schema.org
     *           property [Product.color](https://schema.org/color).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $sizes
     *           The size of the product. To represent different size systems or size types,
     *           consider using this format: [[[size_system:]size_type:]size_value].
     *           For example, in "US:MENS:M", "US" represents size system; "MENS" represents
     *           size type; "M" represents size value. In "GIRLS:27", size system is empty;
     *           "GIRLS" represents size type; "27" represents size value. In "32 inches",
     *           both size system and size type are empty, while size value is "32 inches".
     *           A maximum of 20 values are allowed per
     *           [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     *           encoded string with a length limit of 128 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [size](https://support.google.com/merchants/answer/6324492),
     *           [size_type](https://support.google.com/merchants/answer/6324497), and
     *           [size_system](https://support.google.com/merchants/answer/6324502).
     *           Schema.org property [Product.size](https://schema.org/size).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $materials
     *           The material of the product. For example, "leather", "wooden".
     *           A maximum of 20 values are allowed. Each value must be a UTF-8 encoded
     *           string with a length limit of 200 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [material](https://support.google.com/merchants/answer/6324410). Schema.org
     *           property [Product.material](https://schema.org/material).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $patterns
     *           The pattern or graphic print of the product. For example, "striped", "polka
     *           dot", "paisley".
     *           A maximum of 20 values are allowed per
     *           [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     *           encoded string with a length limit of 128 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [pattern](https://support.google.com/merchants/answer/6324483). Schema.org
     *           property [Product.pattern](https://schema.org/pattern).
     *     @type string[]|\Google\Protobuf\Internal\RepeatedField $conditions
     *           The condition of the product. Strongly encouraged to use the standard
     *           values: "new", "refurbished", "used".
     *           A maximum of 1 value is allowed per
     *           [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     *           encoded string with a length limit of 128 characters. Otherwise, an
     *           INVALID_ARGUMENT error is returned.
     *           Corresponding properties: Google Merchant Center property
     *           [condition](https://support.google.com/merchants/answer/6324469).
     *           Schema.org property
     *           [Offer.itemCondition](https://schema.org/itemCondition).
     *     @type \Google\Cloud\Retail\V2\Promotion[]|\Google\Protobuf\Internal\RepeatedField $promotions
     *           The promotions applied to the product. A maximum of 10 values are allowed
     *           per [Product][google.cloud.retail.v2.Product]. Only
     *           [Promotion.promotion_id][google.cloud.retail.v2.Promotion.promotion_id]
     *           will be used, other fields will be ignored if set.
     *     @type \Google\Protobuf\Timestamp $publish_time
     *           The timestamp when the product is published by the retailer for the first
     *           time, which indicates the freshness of the products. Note that this field
     *           is different from
     *           [available_time][google.cloud.retail.v2.Product.available_time], given it
     *           purely describes product freshness regardless of when it is available on
     *           search and recommendation.
     *     @type \Google\Protobuf\FieldMask $retrievable_fields
     *           Indicates which fields in the [Product][google.cloud.retail.v2.Product]s
     *           are returned in [SearchResponse][google.cloud.retail.v2.SearchResponse].
     *           Supported fields for all [type][google.cloud.retail.v2.Product.type]s:
     *           * [audience][google.cloud.retail.v2.Product.audience]
     *           * [availability][google.cloud.retail.v2.Product.availability]
     *           * [brands][google.cloud.retail.v2.Product.brands]
     *           * [color_info][google.cloud.retail.v2.Product.color_info]
     *           * [conditions][google.cloud.retail.v2.Product.conditions]
     *           * [gtin][google.cloud.retail.v2.Product.gtin]
     *           * [materials][google.cloud.retail.v2.Product.materials]
     *           * [name][google.cloud.retail.v2.Product.name]
     *           * [patterns][google.cloud.retail.v2.Product.patterns]
     *           * [price_info][google.cloud.retail.v2.Product.price_info]
     *           * [rating][google.cloud.retail.v2.Product.rating]
     *           * [sizes][google.cloud.retail.v2.Product.sizes]
     *           * [title][google.cloud.retail.v2.Product.title]
     *           * [uri][google.cloud.retail.v2.Product.uri]
     *           Supported fields only for
     *           [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     *           [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION]:
     *           * [categories][google.cloud.retail.v2.Product.categories]
     *           * [description][google.cloud.retail.v2.Product.description]
     *           * [images][google.cloud.retail.v2.Product.images]
     *           Supported fields only for
     *           [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]:
     *           * Only the first image in [images][google.cloud.retail.v2.Product.images]
     *           To mark [attributes][google.cloud.retail.v2.Product.attributes] as
     *           retrievable, include paths of the form "attributes.key" where "key" is the
     *           key of a custom attribute, as specified in
     *           [attributes][google.cloud.retail.v2.Product.attributes].
     *           For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     *           [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION], the
     *           following fields are always returned in
     *           [SearchResponse][google.cloud.retail.v2.SearchResponse] by default:
     *           * [name][google.cloud.retail.v2.Product.name]
     *           For [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT], the
     *           following fields are always returned in by default:
     *           * [name][google.cloud.retail.v2.Product.name]
     *           * [color_info][google.cloud.retail.v2.Product.color_info]
     *           The maximum number of paths is 30. Otherwise, an INVALID_ARGUMENT error is
     *           returned.
     *           Note: Returning more fields in
     *           [SearchResponse][google.cloud.retail.v2.SearchResponse] can increase
     *           response payload size and serving latency.
     *     @type \Google\Cloud\Retail\V2\Product[]|\Google\Protobuf\Internal\RepeatedField $variants
     *           Output only. Product variants grouped together on primary product which
     *           share similar product attributes. It's automatically grouped by
     *           [primary_product_id][google.cloud.retail.v2.Product.primary_product_id] for
     *           all the product variants. Only populated for
     *           [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     *           [Product][google.cloud.retail.v2.Product]s.
     *           Note: This field is OUTPUT_ONLY for
     *           [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct].
     *           Do not set this field in API requests.
     * }
     */
    public function __construct($data = NULL) {
        \GPBMetadata\Google\Cloud\Retail\V2\Product::initOnce();
        parent::__construct($data);
    }

    /**
     * The timestamp when this product becomes unavailable for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     * If it is set, the [Product][google.cloud.retail.v2.Product] is not
     * available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     * [expire_time][google.cloud.retail.v2.Product.expire_time]. However, the
     * product can still be retrieved by
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     * and
     * [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     * [expire_time][google.cloud.retail.v2.Product.expire_time] must be later
     * than [available_time][google.cloud.retail.v2.Product.available_time] and
     * [publish_time][google.cloud.retail.v2.Product.publish_time], otherwise an
     * INVALID_ARGUMENT error is thrown.
     * Corresponding properties: Google Merchant Center property
     * [expiration_date](https://support.google.com/merchants/answer/6324499).
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp expire_time = 16;</code>
     * @return \Google\Protobuf\Timestamp|null
     */
    public function getExpireTime()
    {
        return $this->readOneof(16);
    }

    public function hasExpireTime()
    {
        return $this->hasOneof(16);
    }

    /**
     * The timestamp when this product becomes unavailable for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     * If it is set, the [Product][google.cloud.retail.v2.Product] is not
     * available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     * [expire_time][google.cloud.retail.v2.Product.expire_time]. However, the
     * product can still be retrieved by
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     * and
     * [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     * [expire_time][google.cloud.retail.v2.Product.expire_time] must be later
     * than [available_time][google.cloud.retail.v2.Product.available_time] and
     * [publish_time][google.cloud.retail.v2.Product.publish_time], otherwise an
     * INVALID_ARGUMENT error is thrown.
     * Corresponding properties: Google Merchant Center property
     * [expiration_date](https://support.google.com/merchants/answer/6324499).
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp expire_time = 16;</code>
     * @param \Google\Protobuf\Timestamp $var
     * @return $this
     */
    public function setExpireTime($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\Timestamp::class);
        $this->writeOneof(16, $var);

        return $this;
    }

    /**
     * Input only. The TTL (time to live) of the product.
     * If it is set, it must be a non-negative value, and
     * [expire_time][google.cloud.retail.v2.Product.expire_time] is set as
     * current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl]. The
     * derived [expire_time][google.cloud.retail.v2.Product.expire_time] is
     * returned in the output and [ttl][google.cloud.retail.v2.Product.ttl] is
     * left blank when retrieving the [Product][google.cloud.retail.v2.Product].
     * If it is set, the product is not available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     * current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl].
     * However, the product can still be retrieved by
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     * and
     * [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     *
     * Generated from protobuf field <code>.google.protobuf.Duration ttl = 17 [(.google.api.field_behavior) = INPUT_ONLY];</code>
     * @return \Google\Protobuf\Duration|null
     */
    public function getTtl()
    {
        return $this->readOneof(17);
    }

    public function hasTtl()
    {
        return $this->hasOneof(17);
    }

    /**
     * Input only. The TTL (time to live) of the product.
     * If it is set, it must be a non-negative value, and
     * [expire_time][google.cloud.retail.v2.Product.expire_time] is set as
     * current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl]. The
     * derived [expire_time][google.cloud.retail.v2.Product.expire_time] is
     * returned in the output and [ttl][google.cloud.retail.v2.Product.ttl] is
     * left blank when retrieving the [Product][google.cloud.retail.v2.Product].
     * If it is set, the product is not available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search] after
     * current timestamp plus [ttl][google.cloud.retail.v2.Product.ttl].
     * However, the product can still be retrieved by
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct]
     * and
     * [ProductService.ListProducts][google.cloud.retail.v2.ProductService.ListProducts].
     *
     * Generated from protobuf field <code>.google.protobuf.Duration ttl = 17 [(.google.api.field_behavior) = INPUT_ONLY];</code>
     * @param \Google\Protobuf\Duration $var
     * @return $this
     */
    public function setTtl($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\Duration::class);
        $this->writeOneof(17, $var);

        return $this;
    }

    /**
     * Immutable. Full resource name of the product, such as
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id`.
     *
     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Immutable. Full resource name of the product, such as
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/product_id`.
     *
     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @param string $var
     * @return $this
     */
    public function setName($var)
    {
        GPBUtil::checkString($var, True);
        $this->name = $var;

        return $this;
    }

    /**
     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
     * the final component of [name][google.cloud.retail.v2.Product.name]. For
     * example, this field is "id_1", if
     * [name][google.cloud.retail.v2.Product.name] is
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1`.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
     * property [Product.sku](https://schema.org/sku).
     *
     * Generated from protobuf field <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @return string
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Immutable. [Product][google.cloud.retail.v2.Product] identifier, which is
     * the final component of [name][google.cloud.retail.v2.Product.name]. For
     * example, this field is "id_1", if
     * [name][google.cloud.retail.v2.Product.name] is
     * `projects/&#42;&#47;locations/global/catalogs/default_catalog/branches/default_branch/products/id_1`.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [id](https://support.google.com/merchants/answer/6324405). Schema.org
     * property [Product.sku](https://schema.org/sku).
     *
     * Generated from protobuf field <code>string id = 2 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @param string $var
     * @return $this
     */
    public function setId($var)
    {
        GPBUtil::checkString($var, True);
        $this->id = $var;

        return $this;
    }

    /**
     * Immutable. The type of the product. Default to
     * [Catalog.product_level_config.ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
     * if unset.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @return int
     */
    public function getType()
    {
        return $this->type;
    }

    /**
     * Immutable. The type of the product. Default to
     * [Catalog.product_level_config.ingestion_product_type][google.cloud.retail.v2.ProductLevelConfig.ingestion_product_type]
     * if unset.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Type type = 3 [(.google.api.field_behavior) = IMMUTABLE];</code>
     * @param int $var
     * @return $this
     */
    public function setType($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Retail\V2\Product\Type::class);
        $this->type = $var;

        return $this;
    }

    /**
     * Variant group identifier. Must be an
     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
     * this product. Otherwise, an error is thrown.
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
     * set to the same value as [id][google.cloud.retail.v2.Product.id].
     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
     * be empty. A maximum of 2,000 products are allowed to share the same
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
     * error is returned.
     * Corresponding properties: Google Merchant Center property
     * [item_group_id](https://support.google.com/merchants/answer/6324507).
     * Schema.org property
     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
     *
     * Generated from protobuf field <code>string primary_product_id = 4;</code>
     * @return string
     */
    public function getPrimaryProductId()
    {
        return $this->primary_product_id;
    }

    /**
     * Variant group identifier. Must be an
     * [id][google.cloud.retail.v2.Product.id], with the same parent branch with
     * this product. Otherwise, an error is thrown.
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s, this field can only be empty or
     * set to the same value as [id][google.cloud.retail.v2.Product.id].
     * For VARIANT [Product][google.cloud.retail.v2.Product]s, this field cannot
     * be empty. A maximum of 2,000 products are allowed to share the same
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]. Otherwise, an INVALID_ARGUMENT
     * error is returned.
     * Corresponding properties: Google Merchant Center property
     * [item_group_id](https://support.google.com/merchants/answer/6324507).
     * Schema.org property
     * [Product.inProductGroupWithID](https://schema.org/inProductGroupWithID).
     *
     * Generated from protobuf field <code>string primary_product_id = 4;</code>
     * @param string $var
     * @return $this
     */
    public function setPrimaryProductId($var)
    {
        GPBUtil::checkString($var, True);
        $this->primary_product_id = $var;

        return $this;
    }

    /**
     * The [id][google.cloud.retail.v2.Product.id] of the collection members when
     * [type][google.cloud.retail.v2.Product.type] is
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION].
     * Non-existent product ids are allowed.
     * The [type][google.cloud.retail.v2.Product.type] of the members must be
     * either [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] or
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT] otherwise and
     * INVALID_ARGUMENT error is thrown. Should not set it for other types. A
     * maximum of 1000 values are allowed. Otherwise, an INVALID_ARGUMENT error is
     * return.
     *
     * Generated from protobuf field <code>repeated string collection_member_ids = 5;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getCollectionMemberIds()
    {
        return $this->collection_member_ids;
    }

    /**
     * The [id][google.cloud.retail.v2.Product.id] of the collection members when
     * [type][google.cloud.retail.v2.Product.type] is
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION].
     * Non-existent product ids are allowed.
     * The [type][google.cloud.retail.v2.Product.type] of the members must be
     * either [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] or
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT] otherwise and
     * INVALID_ARGUMENT error is thrown. Should not set it for other types. A
     * maximum of 1000 values are allowed. Otherwise, an INVALID_ARGUMENT error is
     * return.
     *
     * Generated from protobuf field <code>repeated string collection_member_ids = 5;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setCollectionMemberIds($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->collection_member_ids = $arr;

        return $this;
    }

    /**
     * The Global Trade Item Number (GTIN) of the product.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This field must be a Unigram. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Corresponding properties: Google Merchant Center property
     * [gtin](https://support.google.com/merchants/answer/6324461).
     * Schema.org property
     * [Product.isbn](https://schema.org/isbn),
     * [Product.gtin8](https://schema.org/gtin8),
     * [Product.gtin12](https://schema.org/gtin12),
     * [Product.gtin13](https://schema.org/gtin13), or
     * [Product.gtin14](https://schema.org/gtin14).
     * If the value is not a valid GTIN, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>string gtin = 6;</code>
     * @return string
     */
    public function getGtin()
    {
        return $this->gtin;
    }

    /**
     * The Global Trade Item Number (GTIN) of the product.
     * This field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This field must be a Unigram. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Corresponding properties: Google Merchant Center property
     * [gtin](https://support.google.com/merchants/answer/6324461).
     * Schema.org property
     * [Product.isbn](https://schema.org/isbn),
     * [Product.gtin8](https://schema.org/gtin8),
     * [Product.gtin12](https://schema.org/gtin12),
     * [Product.gtin13](https://schema.org/gtin13), or
     * [Product.gtin14](https://schema.org/gtin14).
     * If the value is not a valid GTIN, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>string gtin = 6;</code>
     * @param string $var
     * @return $this
     */
    public function setGtin($var)
    {
        GPBUtil::checkString($var, True);
        $this->gtin = $var;

        return $this;
    }

    /**
     * Product categories. This field is repeated for supporting one product
     * belonging to several parallel categories. Strongly recommended using the
     * full path for better search / recommendation quality.
     * To represent full path of category, use '>' sign to separate different
     * hierarchies. If '>' is part of the category name, please replace it with
     * other character(s).
     * For example, if a shoes product belongs to both
     * ["Shoes & Accessories" -> "Shoes"] and
     * ["Sports & Fitness" -> "Athletic Clothing" -> "Shoes"], it could be
     * represented as:
     *      "categories": [
     *        "Shoes & Accessories > Shoes",
     *        "Sports & Fitness > Athletic Clothing > Shoes"
     *      ]
     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
     * error is returned.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
     * Each value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [google_product_category][mc_google_product_category]. Schema.org property
     * [Product.category] (https://schema.org/category).
     * [mc_google_product_category]:
     * https://support.google.com/merchants/answer/6324436
     *
     * Generated from protobuf field <code>repeated string categories = 7;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getCategories()
    {
        return $this->categories;
    }

    /**
     * Product categories. This field is repeated for supporting one product
     * belonging to several parallel categories. Strongly recommended using the
     * full path for better search / recommendation quality.
     * To represent full path of category, use '>' sign to separate different
     * hierarchies. If '>' is part of the category name, please replace it with
     * other character(s).
     * For example, if a shoes product belongs to both
     * ["Shoes & Accessories" -> "Shoes"] and
     * ["Sports & Fitness" -> "Athletic Clothing" -> "Shoes"], it could be
     * represented as:
     *      "categories": [
     *        "Shoes & Accessories > Shoes",
     *        "Sports & Fitness > Athletic Clothing > Shoes"
     *      ]
     * Must be set for [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product] otherwise an INVALID_ARGUMENT
     * error is returned.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Empty values are not allowed.
     * Each value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [google_product_category][mc_google_product_category]. Schema.org property
     * [Product.category] (https://schema.org/category).
     * [mc_google_product_category]:
     * https://support.google.com/merchants/answer/6324436
     *
     * Generated from protobuf field <code>repeated string categories = 7;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setCategories($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->categories = $arr;

        return $this;
    }

    /**
     * Required. Product title.
     * This field must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
     * property [Product.name](https://schema.org/name).
     *
     * Generated from protobuf field <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Required. Product title.
     * This field must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [title](https://support.google.com/merchants/answer/6324415). Schema.org
     * property [Product.name](https://schema.org/name).
     *
     * Generated from protobuf field <code>string title = 8 [(.google.api.field_behavior) = REQUIRED];</code>
     * @param string $var
     * @return $this
     */
    public function setTitle($var)
    {
        GPBUtil::checkString($var, True);
        $this->title = $var;

        return $this;
    }

    /**
     * The brands of the product.
     * A maximum of 30 brands are allowed. Each brand must be a UTF-8 encoded
     * string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [brand](https://support.google.com/merchants/answer/6324351). Schema.org
     * property [Product.brand](https://schema.org/brand).
     *
     * Generated from protobuf field <code>repeated string brands = 9;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getBrands()
    {
        return $this->brands;
    }

    /**
     * The brands of the product.
     * A maximum of 30 brands are allowed. Each brand must be a UTF-8 encoded
     * string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [brand](https://support.google.com/merchants/answer/6324351). Schema.org
     * property [Product.brand](https://schema.org/brand).
     *
     * Generated from protobuf field <code>repeated string brands = 9;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setBrands($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->brands = $arr;

        return $this;
    }

    /**
     * Product description.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [description](https://support.google.com/merchants/answer/6324468).
     * Schema.org property [Product.description](https://schema.org/description).
     *
     * Generated from protobuf field <code>string description = 10;</code>
     * @return string
     */
    public function getDescription()
    {
        return $this->description;
    }

    /**
     * Product description.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [description](https://support.google.com/merchants/answer/6324468).
     * Schema.org property [Product.description](https://schema.org/description).
     *
     * Generated from protobuf field <code>string description = 10;</code>
     * @param string $var
     * @return $this
     */
    public function setDescription($var)
    {
        GPBUtil::checkString($var, True);
        $this->description = $var;

        return $this;
    }

    /**
     * Language of the title/description and other string attributes. Use language
     * tags defined by [BCP 47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt).
     * For product prediction, this field is ignored and the model automatically
     * detects the text language. The [Product][google.cloud.retail.v2.Product]
     * can include text in different languages, but duplicating
     * [Product][google.cloud.retail.v2.Product]s to provide text in multiple
     * languages can result in degraded model performance.
     * For product search this field is in use. It defaults to "en-US" if unset.
     *
     * Generated from protobuf field <code>string language_code = 11;</code>
     * @return string
     */
    public function getLanguageCode()
    {
        return $this->language_code;
    }

    /**
     * Language of the title/description and other string attributes. Use language
     * tags defined by [BCP 47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt).
     * For product prediction, this field is ignored and the model automatically
     * detects the text language. The [Product][google.cloud.retail.v2.Product]
     * can include text in different languages, but duplicating
     * [Product][google.cloud.retail.v2.Product]s to provide text in multiple
     * languages can result in degraded model performance.
     * For product search this field is in use. It defaults to "en-US" if unset.
     *
     * Generated from protobuf field <code>string language_code = 11;</code>
     * @param string $var
     * @return $this
     */
    public function setLanguageCode($var)
    {
        GPBUtil::checkString($var, True);
        $this->language_code = $var;

        return $this;
    }

    /**
     * Highly encouraged. Extra product attributes to be included. For example,
     * for products, this could include the store name, vendor, style, color, etc.
     * These are very strong signals for recommendation model, thus we highly
     * recommend providing the attributes here.
     * Features that can take on one of a limited number of possible values. Two
     * types of features can be set are:
     * Textual features. some examples would be the brand/maker of a product, or
     * country of a customer. Numerical features. Some examples would be the
     * height/weight of a product, or age of a customer.
     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
     * }`.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * Max entries count: 200.
     * * The key must be a UTF-8 encoded string with a length limit of 128
     *   characters.
     * * For indexable attribute, the key must match the pattern:
     *   `[a-zA-Z0-9][a-zA-Z0-9_]*`. For example, `key0LikeThis` or
     *   `KEY_1_LIKE_THIS`.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a non-empty UTF-8 encoded string with a
     *   length limit of 256 characters.
     * * For number attributes, at most 400 values are allowed.
     *
     * Generated from protobuf field <code>map<string, .google.cloud.retail.v2.CustomAttribute> attributes = 12;</code>
     * @return \Google\Protobuf\Internal\MapField
     */
    public function getAttributes()
    {
        return $this->attributes;
    }

    /**
     * Highly encouraged. Extra product attributes to be included. For example,
     * for products, this could include the store name, vendor, style, color, etc.
     * These are very strong signals for recommendation model, thus we highly
     * recommend providing the attributes here.
     * Features that can take on one of a limited number of possible values. Two
     * types of features can be set are:
     * Textual features. some examples would be the brand/maker of a product, or
     * country of a customer. Numerical features. Some examples would be the
     * height/weight of a product, or age of a customer.
     * For example: `{ "vendor": {"text": ["vendor123", "vendor456"]},
     * "lengths_cm": {"numbers":[2.3, 15.4]}, "heights_cm": {"numbers":[8.1, 6.4]}
     * }`.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * Max entries count: 200.
     * * The key must be a UTF-8 encoded string with a length limit of 128
     *   characters.
     * * For indexable attribute, the key must match the pattern:
     *   `[a-zA-Z0-9][a-zA-Z0-9_]*`. For example, `key0LikeThis` or
     *   `KEY_1_LIKE_THIS`.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a non-empty UTF-8 encoded string with a
     *   length limit of 256 characters.
     * * For number attributes, at most 400 values are allowed.
     *
     * Generated from protobuf field <code>map<string, .google.cloud.retail.v2.CustomAttribute> attributes = 12;</code>
     * @param array|\Google\Protobuf\Internal\MapField $var
     * @return $this
     */
    public function setAttributes($var)
    {
        $arr = GPBUtil::checkMapField($var, \Google\Protobuf\Internal\GPBType::STRING, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Cloud\Retail\V2\CustomAttribute::class);
        $this->attributes = $arr;

        return $this;
    }

    /**
     * Custom tags associated with the product.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
     * encoded string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * This tag can be used for filtering recommendation results by passing the
     * tag as part of the
     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
     * Corresponding properties: Google Merchant Center property
     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
     *
     * Generated from protobuf field <code>repeated string tags = 13;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getTags()
    {
        return $this->tags;
    }

    /**
     * Custom tags associated with the product.
     * At most 250 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. This value must be a UTF-8
     * encoded string with a length limit of 1,000 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * This tag can be used for filtering recommendation results by passing the
     * tag as part of the
     * [PredictRequest.filter][google.cloud.retail.v2.PredictRequest.filter].
     * Corresponding properties: Google Merchant Center property
     * [custom_label_0–4](https://support.google.com/merchants/answer/6324473).
     *
     * Generated from protobuf field <code>repeated string tags = 13;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setTags($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->tags = $arr;

        return $this;
    }

    /**
     * Product price and cost information.
     * Corresponding properties: Google Merchant Center property
     * [price](https://support.google.com/merchants/answer/6324371).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
     * @return \Google\Cloud\Retail\V2\PriceInfo|null
     */
    public function getPriceInfo()
    {
        return $this->price_info;
    }

    public function hasPriceInfo()
    {
        return isset($this->price_info);
    }

    public function clearPriceInfo()
    {
        unset($this->price_info);
    }

    /**
     * Product price and cost information.
     * Corresponding properties: Google Merchant Center property
     * [price](https://support.google.com/merchants/answer/6324371).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.PriceInfo price_info = 14;</code>
     * @param \Google\Cloud\Retail\V2\PriceInfo $var
     * @return $this
     */
    public function setPriceInfo($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Retail\V2\PriceInfo::class);
        $this->price_info = $var;

        return $this;
    }

    /**
     * The rating of this product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Rating rating = 15;</code>
     * @return \Google\Cloud\Retail\V2\Rating|null
     */
    public function getRating()
    {
        return $this->rating;
    }

    public function hasRating()
    {
        return isset($this->rating);
    }

    public function clearRating()
    {
        unset($this->rating);
    }

    /**
     * The rating of this product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Rating rating = 15;</code>
     * @param \Google\Cloud\Retail\V2\Rating $var
     * @return $this
     */
    public function setRating($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Retail\V2\Rating::class);
        $this->rating = $var;

        return $this;
    }

    /**
     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
     * available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp available_time = 18;</code>
     * @return \Google\Protobuf\Timestamp|null
     */
    public function getAvailableTime()
    {
        return $this->available_time;
    }

    public function hasAvailableTime()
    {
        return isset($this->available_time);
    }

    public function clearAvailableTime()
    {
        unset($this->available_time);
    }

    /**
     * The timestamp when this [Product][google.cloud.retail.v2.Product] becomes
     * available for
     * [SearchService.Search][google.cloud.retail.v2.SearchService.Search].
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp available_time = 18;</code>
     * @param \Google\Protobuf\Timestamp $var
     * @return $this
     */
    public function setAvailableTime($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\Timestamp::class);
        $this->available_time = $var;

        return $this;
    }

    /**
     * The online availability of the [Product][google.cloud.retail.v2.Product].
     * Default to
     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
     * Corresponding properties: Google Merchant Center property
     * [availability](https://support.google.com/merchants/answer/6324448).
     * Schema.org property [Offer.availability](https://schema.org/availability).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
     * @return int
     */
    public function getAvailability()
    {
        return $this->availability;
    }

    /**
     * The online availability of the [Product][google.cloud.retail.v2.Product].
     * Default to
     * [Availability.IN_STOCK][google.cloud.retail.v2.Product.Availability.IN_STOCK].
     * Corresponding properties: Google Merchant Center property
     * [availability](https://support.google.com/merchants/answer/6324448).
     * Schema.org property [Offer.availability](https://schema.org/availability).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Product.Availability availability = 19;</code>
     * @param int $var
     * @return $this
     */
    public function setAvailability($var)
    {
        GPBUtil::checkEnum($var, \Google\Cloud\Retail\V2\Product\Availability::class);
        $this->availability = $var;

        return $this;
    }

    /**
     * The available quantity of the item.
     *
     * Generated from protobuf field <code>.google.protobuf.Int32Value available_quantity = 20;</code>
     * @return \Google\Protobuf\Int32Value|null
     */
    public function getAvailableQuantity()
    {
        return $this->available_quantity;
    }

    public function hasAvailableQuantity()
    {
        return isset($this->available_quantity);
    }

    public function clearAvailableQuantity()
    {
        unset($this->available_quantity);
    }

    /**
     * Returns the unboxed value from <code>getAvailableQuantity()</code>

     * The available quantity of the item.
     *
     * Generated from protobuf field <code>.google.protobuf.Int32Value available_quantity = 20;</code>
     * @return int|null
     */
    public function getAvailableQuantityValue()
    {
        return $this->readWrapperValue("available_quantity");
    }

    /**
     * The available quantity of the item.
     *
     * Generated from protobuf field <code>.google.protobuf.Int32Value available_quantity = 20;</code>
     * @param \Google\Protobuf\Int32Value $var
     * @return $this
     */
    public function setAvailableQuantity($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\Int32Value::class);
        $this->available_quantity = $var;

        return $this;
    }

    /**
     * Sets the field by wrapping a primitive type in a Google\Protobuf\Int32Value object.

     * The available quantity of the item.
     *
     * Generated from protobuf field <code>.google.protobuf.Int32Value available_quantity = 20;</code>
     * @param int|null $var
     * @return $this
     */
    public function setAvailableQuantityValue($var)
    {
        $this->writeWrapperValue("available_quantity", $var);
        return $this;}

    /**
     * Fulfillment information, such as the store IDs for in-store pickup or
     * region IDs for different shipping methods.
     * All the elements must have distinct
     * [FulfillmentInfo.type][google.cloud.retail.v2.FulfillmentInfo.type].
     * Otherwise, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.FulfillmentInfo fulfillment_info = 21;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getFulfillmentInfo()
    {
        return $this->fulfillment_info;
    }

    /**
     * Fulfillment information, such as the store IDs for in-store pickup or
     * region IDs for different shipping methods.
     * All the elements must have distinct
     * [FulfillmentInfo.type][google.cloud.retail.v2.FulfillmentInfo.type].
     * Otherwise, an INVALID_ARGUMENT error is returned.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.FulfillmentInfo fulfillment_info = 21;</code>
     * @param \Google\Cloud\Retail\V2\FulfillmentInfo[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setFulfillmentInfo($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Cloud\Retail\V2\FulfillmentInfo::class);
        $this->fulfillment_info = $arr;

        return $this;
    }

    /**
     * Canonical URL directly linking to the product detail page.
     * It is strongly recommended to provide a valid uri for the product,
     * otherwise the service performance could be significantly degraded.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
     * property [Offer.url](https://schema.org/url).
     *
     * Generated from protobuf field <code>string uri = 22;</code>
     * @return string
     */
    public function getUri()
    {
        return $this->uri;
    }

    /**
     * Canonical URL directly linking to the product detail page.
     * It is strongly recommended to provide a valid uri for the product,
     * otherwise the service performance could be significantly degraded.
     * This field must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [link](https://support.google.com/merchants/answer/6324416). Schema.org
     * property [Offer.url](https://schema.org/url).
     *
     * Generated from protobuf field <code>string uri = 22;</code>
     * @param string $var
     * @return $this
     */
    public function setUri($var)
    {
        GPBUtil::checkString($var, True);
        $this->uri = $var;

        return $this;
    }

    /**
     * Product images for the product. We highly recommend putting the main
     * image first.
     * A maximum of 300 images are allowed.
     * Corresponding properties: Google Merchant Center property
     * [image_link](https://support.google.com/merchants/answer/6324350).
     * Schema.org property [Product.image](https://schema.org/image).
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getImages()
    {
        return $this->images;
    }

    /**
     * Product images for the product. We highly recommend putting the main
     * image first.
     * A maximum of 300 images are allowed.
     * Corresponding properties: Google Merchant Center property
     * [image_link](https://support.google.com/merchants/answer/6324350).
     * Schema.org property [Product.image](https://schema.org/image).
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Image images = 23;</code>
     * @param \Google\Cloud\Retail\V2\Image[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setImages($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Cloud\Retail\V2\Image::class);
        $this->images = $arr;

        return $this;
    }

    /**
     * The target group associated with a given audience (e.g. male, veterans,
     * car owners, musicians, etc.) of the product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Audience audience = 24;</code>
     * @return \Google\Cloud\Retail\V2\Audience|null
     */
    public function getAudience()
    {
        return $this->audience;
    }

    public function hasAudience()
    {
        return isset($this->audience);
    }

    public function clearAudience()
    {
        unset($this->audience);
    }

    /**
     * The target group associated with a given audience (e.g. male, veterans,
     * car owners, musicians, etc.) of the product.
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.Audience audience = 24;</code>
     * @param \Google\Cloud\Retail\V2\Audience $var
     * @return $this
     */
    public function setAudience($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Retail\V2\Audience::class);
        $this->audience = $var;

        return $this;
    }

    /**
     * The color of the product.
     * Corresponding properties: Google Merchant Center property
     * [color](https://support.google.com/merchants/answer/6324487). Schema.org
     * property [Product.color](https://schema.org/color).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.ColorInfo color_info = 25;</code>
     * @return \Google\Cloud\Retail\V2\ColorInfo|null
     */
    public function getColorInfo()
    {
        return $this->color_info;
    }

    public function hasColorInfo()
    {
        return isset($this->color_info);
    }

    public function clearColorInfo()
    {
        unset($this->color_info);
    }

    /**
     * The color of the product.
     * Corresponding properties: Google Merchant Center property
     * [color](https://support.google.com/merchants/answer/6324487). Schema.org
     * property [Product.color](https://schema.org/color).
     *
     * Generated from protobuf field <code>.google.cloud.retail.v2.ColorInfo color_info = 25;</code>
     * @param \Google\Cloud\Retail\V2\ColorInfo $var
     * @return $this
     */
    public function setColorInfo($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Retail\V2\ColorInfo::class);
        $this->color_info = $var;

        return $this;
    }

    /**
     * The size of the product. To represent different size systems or size types,
     * consider using this format: [[[size_system:]size_type:]size_value].
     * For example, in "US:MENS:M", "US" represents size system; "MENS" represents
     * size type; "M" represents size value. In "GIRLS:27", size system is empty;
     * "GIRLS" represents size type; "27" represents size value. In "32 inches",
     * both size system and size type are empty, while size value is "32 inches".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [size](https://support.google.com/merchants/answer/6324492),
     * [size_type](https://support.google.com/merchants/answer/6324497), and
     * [size_system](https://support.google.com/merchants/answer/6324502).
     * Schema.org property [Product.size](https://schema.org/size).
     *
     * Generated from protobuf field <code>repeated string sizes = 26;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getSizes()
    {
        return $this->sizes;
    }

    /**
     * The size of the product. To represent different size systems or size types,
     * consider using this format: [[[size_system:]size_type:]size_value].
     * For example, in "US:MENS:M", "US" represents size system; "MENS" represents
     * size type; "M" represents size value. In "GIRLS:27", size system is empty;
     * "GIRLS" represents size type; "27" represents size value. In "32 inches",
     * both size system and size type are empty, while size value is "32 inches".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [size](https://support.google.com/merchants/answer/6324492),
     * [size_type](https://support.google.com/merchants/answer/6324497), and
     * [size_system](https://support.google.com/merchants/answer/6324502).
     * Schema.org property [Product.size](https://schema.org/size).
     *
     * Generated from protobuf field <code>repeated string sizes = 26;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setSizes($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->sizes = $arr;

        return $this;
    }

    /**
     * The material of the product. For example, "leather", "wooden".
     * A maximum of 20 values are allowed. Each value must be a UTF-8 encoded
     * string with a length limit of 200 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [material](https://support.google.com/merchants/answer/6324410). Schema.org
     * property [Product.material](https://schema.org/material).
     *
     * Generated from protobuf field <code>repeated string materials = 27;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getMaterials()
    {
        return $this->materials;
    }

    /**
     * The material of the product. For example, "leather", "wooden".
     * A maximum of 20 values are allowed. Each value must be a UTF-8 encoded
     * string with a length limit of 200 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [material](https://support.google.com/merchants/answer/6324410). Schema.org
     * property [Product.material](https://schema.org/material).
     *
     * Generated from protobuf field <code>repeated string materials = 27;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setMaterials($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->materials = $arr;

        return $this;
    }

    /**
     * The pattern or graphic print of the product. For example, "striped", "polka
     * dot", "paisley".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [pattern](https://support.google.com/merchants/answer/6324483). Schema.org
     * property [Product.pattern](https://schema.org/pattern).
     *
     * Generated from protobuf field <code>repeated string patterns = 28;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getPatterns()
    {
        return $this->patterns;
    }

    /**
     * The pattern or graphic print of the product. For example, "striped", "polka
     * dot", "paisley".
     * A maximum of 20 values are allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [pattern](https://support.google.com/merchants/answer/6324483). Schema.org
     * property [Product.pattern](https://schema.org/pattern).
     *
     * Generated from protobuf field <code>repeated string patterns = 28;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setPatterns($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->patterns = $arr;

        return $this;
    }

    /**
     * The condition of the product. Strongly encouraged to use the standard
     * values: "new", "refurbished", "used".
     * A maximum of 1 value is allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [condition](https://support.google.com/merchants/answer/6324469).
     * Schema.org property
     * [Offer.itemCondition](https://schema.org/itemCondition).
     *
     * Generated from protobuf field <code>repeated string conditions = 29;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getConditions()
    {
        return $this->conditions;
    }

    /**
     * The condition of the product. Strongly encouraged to use the standard
     * values: "new", "refurbished", "used".
     * A maximum of 1 value is allowed per
     * [Product][google.cloud.retail.v2.Product]. Each value must be a UTF-8
     * encoded string with a length limit of 128 characters. Otherwise, an
     * INVALID_ARGUMENT error is returned.
     * Corresponding properties: Google Merchant Center property
     * [condition](https://support.google.com/merchants/answer/6324469).
     * Schema.org property
     * [Offer.itemCondition](https://schema.org/itemCondition).
     *
     * Generated from protobuf field <code>repeated string conditions = 29;</code>
     * @param string[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setConditions($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::STRING);
        $this->conditions = $arr;

        return $this;
    }

    /**
     * The promotions applied to the product. A maximum of 10 values are allowed
     * per [Product][google.cloud.retail.v2.Product]. Only
     * [Promotion.promotion_id][google.cloud.retail.v2.Promotion.promotion_id]
     * will be used, other fields will be ignored if set.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Promotion promotions = 34;</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getPromotions()
    {
        return $this->promotions;
    }

    /**
     * The promotions applied to the product. A maximum of 10 values are allowed
     * per [Product][google.cloud.retail.v2.Product]. Only
     * [Promotion.promotion_id][google.cloud.retail.v2.Promotion.promotion_id]
     * will be used, other fields will be ignored if set.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Promotion promotions = 34;</code>
     * @param \Google\Cloud\Retail\V2\Promotion[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setPromotions($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Cloud\Retail\V2\Promotion::class);
        $this->promotions = $arr;

        return $this;
    }

    /**
     * The timestamp when the product is published by the retailer for the first
     * time, which indicates the freshness of the products. Note that this field
     * is different from
     * [available_time][google.cloud.retail.v2.Product.available_time], given it
     * purely describes product freshness regardless of when it is available on
     * search and recommendation.
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp publish_time = 33;</code>
     * @return \Google\Protobuf\Timestamp|null
     */
    public function getPublishTime()
    {
        return $this->publish_time;
    }

    public function hasPublishTime()
    {
        return isset($this->publish_time);
    }

    public function clearPublishTime()
    {
        unset($this->publish_time);
    }

    /**
     * The timestamp when the product is published by the retailer for the first
     * time, which indicates the freshness of the products. Note that this field
     * is different from
     * [available_time][google.cloud.retail.v2.Product.available_time], given it
     * purely describes product freshness regardless of when it is available on
     * search and recommendation.
     *
     * Generated from protobuf field <code>.google.protobuf.Timestamp publish_time = 33;</code>
     * @param \Google\Protobuf\Timestamp $var
     * @return $this
     */
    public function setPublishTime($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\Timestamp::class);
        $this->publish_time = $var;

        return $this;
    }

    /**
     * Indicates which fields in the [Product][google.cloud.retail.v2.Product]s
     * are returned in [SearchResponse][google.cloud.retail.v2.SearchResponse].
     * Supported fields for all [type][google.cloud.retail.v2.Product.type]s:
     * * [audience][google.cloud.retail.v2.Product.audience]
     * * [availability][google.cloud.retail.v2.Product.availability]
     * * [brands][google.cloud.retail.v2.Product.brands]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * * [conditions][google.cloud.retail.v2.Product.conditions]
     * * [gtin][google.cloud.retail.v2.Product.gtin]
     * * [materials][google.cloud.retail.v2.Product.materials]
     * * [name][google.cloud.retail.v2.Product.name]
     * * [patterns][google.cloud.retail.v2.Product.patterns]
     * * [price_info][google.cloud.retail.v2.Product.price_info]
     * * [rating][google.cloud.retail.v2.Product.rating]
     * * [sizes][google.cloud.retail.v2.Product.sizes]
     * * [title][google.cloud.retail.v2.Product.title]
     * * [uri][google.cloud.retail.v2.Product.uri]
     * Supported fields only for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION]:
     * * [categories][google.cloud.retail.v2.Product.categories]
     * * [description][google.cloud.retail.v2.Product.description]
     * * [images][google.cloud.retail.v2.Product.images]
     * Supported fields only for
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]:
     * * Only the first image in [images][google.cloud.retail.v2.Product.images]
     * To mark [attributes][google.cloud.retail.v2.Product.attributes] as
     * retrievable, include paths of the form "attributes.key" where "key" is the
     * key of a custom attribute, as specified in
     * [attributes][google.cloud.retail.v2.Product.attributes].
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION], the
     * following fields are always returned in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * For [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT], the
     * following fields are always returned in by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * The maximum number of paths is 30. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Note: Returning more fields in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] can increase
     * response payload size and serving latency.
     *
     * Generated from protobuf field <code>.google.protobuf.FieldMask retrievable_fields = 30;</code>
     * @return \Google\Protobuf\FieldMask|null
     */
    public function getRetrievableFields()
    {
        return $this->retrievable_fields;
    }

    public function hasRetrievableFields()
    {
        return isset($this->retrievable_fields);
    }

    public function clearRetrievableFields()
    {
        unset($this->retrievable_fields);
    }

    /**
     * Indicates which fields in the [Product][google.cloud.retail.v2.Product]s
     * are returned in [SearchResponse][google.cloud.retail.v2.SearchResponse].
     * Supported fields for all [type][google.cloud.retail.v2.Product.type]s:
     * * [audience][google.cloud.retail.v2.Product.audience]
     * * [availability][google.cloud.retail.v2.Product.availability]
     * * [brands][google.cloud.retail.v2.Product.brands]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * * [conditions][google.cloud.retail.v2.Product.conditions]
     * * [gtin][google.cloud.retail.v2.Product.gtin]
     * * [materials][google.cloud.retail.v2.Product.materials]
     * * [name][google.cloud.retail.v2.Product.name]
     * * [patterns][google.cloud.retail.v2.Product.patterns]
     * * [price_info][google.cloud.retail.v2.Product.price_info]
     * * [rating][google.cloud.retail.v2.Product.rating]
     * * [sizes][google.cloud.retail.v2.Product.sizes]
     * * [title][google.cloud.retail.v2.Product.title]
     * * [uri][google.cloud.retail.v2.Product.uri]
     * Supported fields only for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION]:
     * * [categories][google.cloud.retail.v2.Product.categories]
     * * [description][google.cloud.retail.v2.Product.description]
     * * [images][google.cloud.retail.v2.Product.images]
     * Supported fields only for
     * [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT]:
     * * Only the first image in [images][google.cloud.retail.v2.Product.images]
     * To mark [attributes][google.cloud.retail.v2.Product.attributes] as
     * retrievable, include paths of the form "attributes.key" where "key" is the
     * key of a custom attribute, as specified in
     * [attributes][google.cloud.retail.v2.Product.attributes].
     * For [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY] and
     * [Type.COLLECTION][google.cloud.retail.v2.Product.Type.COLLECTION], the
     * following fields are always returned in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * For [Type.VARIANT][google.cloud.retail.v2.Product.Type.VARIANT], the
     * following fields are always returned in by default:
     * * [name][google.cloud.retail.v2.Product.name]
     * * [color_info][google.cloud.retail.v2.Product.color_info]
     * The maximum number of paths is 30. Otherwise, an INVALID_ARGUMENT error is
     * returned.
     * Note: Returning more fields in
     * [SearchResponse][google.cloud.retail.v2.SearchResponse] can increase
     * response payload size and serving latency.
     *
     * Generated from protobuf field <code>.google.protobuf.FieldMask retrievable_fields = 30;</code>
     * @param \Google\Protobuf\FieldMask $var
     * @return $this
     */
    public function setRetrievableFields($var)
    {
        GPBUtil::checkMessage($var, \Google\Protobuf\FieldMask::class);
        $this->retrievable_fields = $var;

        return $this;
    }

    /**
     * Output only. Product variants grouped together on primary product which
     * share similar product attributes. It's automatically grouped by
     * [primary_product_id][google.cloud.retail.v2.Product.primary_product_id] for
     * all the product variants. Only populated for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s.
     * Note: This field is OUTPUT_ONLY for
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct].
     * Do not set this field in API requests.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Product variants = 31 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     * @return \Google\Protobuf\Internal\RepeatedField
     */
    public function getVariants()
    {
        return $this->variants;
    }

    /**
     * Output only. Product variants grouped together on primary product which
     * share similar product attributes. It's automatically grouped by
     * [primary_product_id][google.cloud.retail.v2.Product.primary_product_id] for
     * all the product variants. Only populated for
     * [Type.PRIMARY][google.cloud.retail.v2.Product.Type.PRIMARY]
     * [Product][google.cloud.retail.v2.Product]s.
     * Note: This field is OUTPUT_ONLY for
     * [ProductService.GetProduct][google.cloud.retail.v2.ProductService.GetProduct].
     * Do not set this field in API requests.
     *
     * Generated from protobuf field <code>repeated .google.cloud.retail.v2.Product variants = 31 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
     * @param \Google\Cloud\Retail\V2\Product[]|\Google\Protobuf\Internal\RepeatedField $var
     * @return $this
     */
    public function setVariants($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Cloud\Retail\V2\Product::class);
        $this->variants = $arr;

        return $this;
    }

    /**
     * @return string
     */
    public function getExpiration()
    {
        return $this->whichOneof("expiration");
    }

}

