code: def zoom_out_frag(self, curr_frag):
          
          level = curr_frag[1]
          frag = curr_frag[0]
          output = []
          if level > 0:
              str_level = str(level)
              high_frag = self.spec_level[str_level]["fragments_dict"][frag][
                  "super_index"
              ]
              new_level = level + 1
              output = (high_frag, new_level)
          else:
              output = curr_frag
          return output
docs: :param curr_frag: