onAdd property
      
      void Function()?
      get
      onAdd
      
    
    
    
Implementation
void Function()? get onAdd =>
    callMethod(getProperty(this, 'onAdd'), 'bind', [this]);
      
      set
      onAdd
      (void value()?) 
      
    
    
    
Implementation
set onAdd(void Function()? value) {
  setProperty(this, 'onAdd', value == null ? null : allowInterop(value));
}