code: def _group_unique(self, clusters, adj_list, counts):
          ''' return groups for unique method'''
          if len(clusters) == 1:
              groups = [clusters]
          else:
              groups = [[x] for x in clusters]
  
          return groupf _group_unique(self, clusters, adj_list, counts):
          ''' return groups for unique method'''
          if len(clusters) == 1:
              groups = [clusters]
          else:
              groups = [[x] for x in clusters]
  
          return groups
docs: return groups for unique method