docs: def _update_rs_with_primary_from_member(
          sds,
          replica_set_name,
          server_description):
      """RS with known primary. Process a response from a non-primary.
  
      Pass in a dict of ServerDescriptions, current replica set name, and the
      ServerDescription we are processing.
  
      Returns new topology type.
      """
      assert replica_set_name is not None
  
      if replica_set_name != server_description.replica_set_name:
          sds.pop(server_description.address)
      elif (server_description.me and
            server_description.address != server_description.me):
          sds.pop(server_description.address)
  
      # Had this member been the primary?
      return _check_has_primary(sds)