code: def resize_widget(self, widget, row_span, col_span):
          
  
          row = None
          col = None
  
          for (r, c, rspan, cspan, w) in self._grid_widgets.values():
              if w == widget:
                  row = r
                  col = c
  
                  break
  
          if row is None or col is None:
              raise ValueError("%s not found in grid" % widget)
  
          self.remove_widget(widget)
          self.add_widget(widget, row, col, row_span, col_span)
          self._need_solver_recreate = True
docs: Resize a widget in the grid to new dimensions.
  
          Parameters
          ----------
          widget : Widget
              The widget to resize
          row_span : int
              The number of rows to be occupied by this widget.
          col_span : int
              The number of columns to be occupied by this widget.