code: def on_dn_d_mode_change(self, dnd_mode):
          
          if not isinstance(dnd_mode, DnDMode):
              raise TypeError("dnd_mode can only be an instance of type DnDMode")
          self._call("onDnDModeChange",
                       in_p=[dnd_mode])
docs: Notification when the drag'n drop mode changes.
  
          in dnd_mode of type :class:`DnDMode`
              The new mode for drag'n drop.