docs: def bootstrap_standby_leader(self):
          """ If we found 'standby' key in the configuration, we need to bootstrap
              not a real master, but a 'standby leader', that will take base backup
              from a remote master and start follow it.
          """
          clone_source = self.get_remote_master()
          msg = 'clone from remote master {0}'.format(clone_source.conn_url)
          result = self.clone(clone_source, msg)
          self._post_bootstrap_task.complete(result)
          if result:
              self.state_handler.set_role('standby_leader')
  
          return result