code: @Override
      protected void initEventHandlers() throws CoreException {
  
          view().getBox().setOnDragOver(getHandler(DragEvent.DRAG_OVER));
          view().getBox().setOnDragEntered(getHandler(DragEvent.DRAG_ENTERED_TARGET));
          view().getBox().setOnDragExited(getHandler(DragEvent.DRAG_EXITED_TARGET));
          view().getBox().setOnDragDropped(getHandler(DragEvent.DRAG_DROPPED));
          view().getBox().setOnDragDone(getHandler(DragEvent.DRAG_DONE));
  
      }
docs: {@inheritDoc}