Dart APIunself_componentChipTextonSelected onSelected property Null safety ValueChanged<bool>? onSelected final Implementation final ValueChanged<bool>? onSelected; unself_component unself_component ChipText onSelected 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 ==