patterns property
The pattern or graphic print of the product.
For example, "striped", "polka dot", "paisley". A maximum of 20 values are allowed per 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. Schema.org property Product.pattern.
Implementation
core.List<core.String>? patterns;