Dart APIunself_local_databaseLocalDatabasefield field property Null safety $FieldTable field latefinalinherited Implementation late final $FieldTable field = $FieldTable(this); unself_local_database unself_local_database LocalDatabase field property LocalDatabase class Constructors LocalDatabase Properties allSchemaEntities allTables allTablesCollections attachedDatabase collection collectionDao connection documentDao executor field hashCode migration options resolvedEngine runtimeType schemaVersion streamQueries streamUpdateRules typeMapping Methods $expandVar $write $writeInsertable alias batch beforeOpen close createMigrator createStream customInsert customSelect customSelectQuery customStatement customUpdate customWriteReturning delete doWhenOpened into markTablesUpdated noSuchMethod notifyUpdates select selectOnly tableUpdates toString transaction update Operators operator ==