color property
      
      set
      color
      (Color newValue) 
      
    
    
    
Implementation
set color(Color newValue) {
  if (_color != newValue) {
    final bool canChange = _onPropertyChange?.call(this, 'color') ?? true;
    if (canChange) {
      final Color oldValue = _color;
      _color = newValue;
      _onPropertyChanged?.call(this, 'color', oldValue, newValue);
      _notify();
    }
  }
}