selectedBrush property
      
      Brush
      get
      selectedBrush
      
    
    
    
Implementation
Brush get selectedBrush => _selectedBrush;
      
      set
      selectedBrush
      (Brush newValue) 
      
    
    
    
Implementation
set selectedBrush(Brush newValue) {
  _selectedBrush = newValue;
  _controller?.update();
}