code: def short_label(self):
          
          group_names = sorted([m.player_name for m in self.members])
          group_label = group_names[0]
          if len(group_names) > 1:
              group_label += " + {}".format(len(group_names) - 1)
          return group_label
docs: str: A short description of the group.
  
          >>> device.group.short_label
          'Kitchen + 1'