Dart APIunself_modelFlatdefinition definition property Null safety @override Map<String, IJsonSchema> definition Implementation @override Map<String, IJsonSchema> get definition; unself_model unself_model Flat definition property Flat class Constructors Flat fromJson Properties addMissingKeys copyWith definition entityPath extra fieldMap hashCode includePath key name runtimeType Methods map mapOrNull maybeMap maybeWhen noSuchMethod toJson toString when whenOrNull Operators operator ==