Dart APIunself_componentCardTextEditautoFocus autoFocus property Null safety bool? autoFocus final Implementation final bool? autoFocus; unself_component unself_component CardTextEdit autoFocus property CardTextEdit class Constructors CardTextEdit Properties autoFocus hashCode initialText key onChanged onTap runtimeType Methods createElement createState debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==