primaryProductId property
Variant group identifier.
Must be an id, with the same parent branch with this product. Otherwise, an error is thrown. For Type.PRIMARY Products, this field can only be empty or set to the same value as id. For VARIANT Products, this field cannot be empty. A maximum of 2,000 products are allowed to share the same Type.PRIMARY Product. Otherwise, an INVALID_ARGUMENT error is returned. Corresponding properties: Google Merchant Center property item_group_id. Schema.org property Product.inProductGroupWithID.
Implementation
core.String? primaryProductId;