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