docs: def dragEnterEvent(self, event):
          """
          Listens for query's being dragged and dropped onto this tree.
          
          :param      event | <QDragEnterEvent>
          """
          data = event.mimeData()
          if data.hasFormat('application/x-orb-table') and \
             data.hasFormat('application/x-orb-query'):
              tableName = self.tableTypeName()
              if nativestring(data.data('application/x-orb-table')) == tableName:
                  event.acceptProposedAction()
                  return
          
          super(XOrbTreeWidget, self).dragEnterEvent(event)