Dart APIunself_local_databaseCollectionoptions options property Null safety TextColumn options Implementation TextColumn get options => text().nullable()(); unself_local_database unself_local_database Collection options property Collection class Constructors Collection Properties createRule customConstraints deleteRule dontWriteConstraints hashCode id isStrict listRule name options primaryKey runtimeType system tableName type uniqueKeys updateRule viewRule withoutRowId Methods blob boolean dateTime int64 integer intEnum noSuchMethod real text textEnum toString Operators operator ==