code: def clone(self, clone_member):
          
  
          self._rewind_state = REWIND_STATUS.INITIAL
          ret = self.create_replica(clone_member) == 0
          if ret:
              self._post_restore()
              self._configure_server_parameters()
          return ret
docs: - initialize the replica from an existing member (master or replica)
               - initialize the replica using the replica creation method that
                 works without the replication connection (i.e. restore from on-disk
                 base backup)