docs: def dropEvent( self, event ):
          """
          Processes the drag drop event using the filter set by the \
          setDragDropFilter
          
          :param      event | <QDropEvent>
          """
          filt = self.dragDropFilter()
          if not filt:
              super(XTreeWidget, self).dropEvent(event)
              return
          
          filt(self, event)