variant property
Variant names the specific sellable variant to set, by its id or its SKU. Prefer it over Product for anything sold in sizes, colours or tiers — the price and the stock are the variant's, not the product's.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? variant;