class StateScheduledCommand extends ScheduledCommand {

 _State _state;
 Image _image;

 StateScheduledCommand(this._state, this._image);

 void execute() {
   /*
    * The state has been replaced, or another load event is already
    * pending.
    */
   if (_image._state != _state || this != _state.syntheticEventCommand) {
     return;
   }
   _state.syntheticEventCommand = null;

   /*
    * The image is not attached, so we cannot safely fire the event. We
    * still want the event to fire eventually, so we mark an unhandled
    * load event, which will trigger a new synthetic event the next time
    * the widget is attached.
    */
   if (!_image.isAttached()) {
     _state.getImageElement(_image).dataset[DomImpl.UNHANDLED_EVENT_ATTR] = BrowserEvents.LOAD;
     return;
   }

   dart_html.Event evt =  Dom.createLoadEvent();
   _state.getImageElement(_image).dispatchEvent(evt);
 }
}