iconWatermark property
If available, this is the original 'active' release watermark overlay for the icon. If the item has different versions, this can be overridden by the 'display version watermark icon' from the 'quality' block. Alternatively, if there is no watermark for the version, and the item version has a power cap below the current season power cap, this can be overridden by the iconWatermarkShelved property.
Implementation
@JsonKey(name:'iconWatermark')
String? iconWatermark;