code: def converge(self, playbook=None, **kwargs):
          
          if playbook is None:
              pb = self._get_ansible_playbook(self.playbooks.converge, **kwargs)
          else:
              pb = self._get_ansible_playbook(playbook, **kwargs)
  
          return pb.execute()
docs: Executes ``ansible-playbook`` against the converge playbook unless
          specified otherwise and returns a string.
  
          :param playbook: An optional string containing an absolute path to a
           playbook.
          :param kwargs: An optional keyword arguments.
          :return: str