Dart APIunself_local_databaseFieldDatacollectionId collectionId property Null safety String collectionId final Implementation final String collectionId; unself_local_database unself_local_database FieldData collectionId property FieldData class Constructors FieldData fromJson Properties collectionId created extra hashCode id name required runtimeType system type unique updated Methods copyWith noSuchMethod toColumns toCompanion toJson toJsonString toString Operators operator ==