touched property

bool? get touched

@override
bool? get touched => _touched?.get() ?? false;

set touched (dynamic v)

@override
set touched(dynamic v) {
  if (_touched != null) {
    _touched!.set(v);
  } else if (v != null) {
    _touched = BooleanObservable(Binding.toKey(id, 'touched'), v,
        scope: scope, listener: onPropertyChange);
  }
}