Dart APIunself_componentChipTextselected selected property Null safety bool selected final Implementation final bool selected; unself_component unself_component ChipText selected property ChipText class Constructors ChipText Properties hashCode isEnabled key onSelected runtimeType selected text Methods build createElement debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==