handled property
      
      Future<void> 
      get
      handled
      
    
    
    
Implementation
Future<void> get handled =>
    js_util.promiseToFuture(js_util.getProperty(this, 'handled'));
      
      set
      handled
      (Future<void>  newValue) 
      
    
    
    
Implementation
set handled(Future<void> newValue) {
  js_util.setProperty(this, 'handled', newValue);
}