code: def _config_drag_cols(self, drag_cols):
          
          self._drag_cols = drag_cols
          # remove/display drag icon
          if self._drag_cols:
              self._im_drag.paste(self._im_draggable)
          else:
              self._im_drag.paste(self._im_not_draggable)
          self.focus_set()
          self.update_idletasks()
docs: Configure a new drag_cols state