code: def get_consumer_groups(self, consumer_group_id=None, names_only=False):
          
          if consumer_group_id is None:
              group_ids = self.get_children("/consumers")
          else:
              group_ids = [consumer_group_id]
  
          # Return consumer-group-ids only
          if names_only:
              return {g_id: None for g_id in group_ids}
  
          consumer_offsets = {}
          for g_id in group_ids:
              consumer_offsets[g_id] = self.get_group_offsets(g_id)
          return consumer_offsets
docs: Get information on all the available consumer-groups.
  
          If names_only is False, only list of consumer-group ids are sent.
          If names_only is True, Consumer group offset details are returned
          for all consumer-groups or given consumer-group if given in dict
          format as:-
  
          {
              'group-id':
              {
                  'topic':
                  {
                      'partition': offset-value,
                      ...
                      ...
                  }
              }
          }
  
          :rtype: dict of consumer-group offset details