Dart APIunself_modelFlatentityPath entityPath property Null safety List<String> entityPath Implementation List<String> get entityPath; unself_model unself_model Flat entityPath 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 ==