category property
Category is the expense bucket the SCANNER guessed, as a slug — a hint only. Vendor rules override it whenever they know better, so this is the model's reading and not the account the entry will land on.
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? category;