code: def _group_cluster(self, clusters, adj_list, counts):
          ''' return groups for cluster or directional methods'''
  
          groups = []
          for cluster in clusters:
              groups.append(sorted(cluster, key=lambda x: counts[x],
                                   reverse=True))
  
          return groupf _group_cluster(self, clusters, adj_list, counts):
          ''' return groups for cluster or directional methods'''
  
          groups = []
          for cluster in clusters:
              groups.append(sorted(cluster, key=lambda x: counts[x],
                                   reverse=True))
  
          return groups
docs: return groups for cluster or directional methods