code: def post_headline(self, name, level, message):
          
  
          self._client.post_headline(name, level, message)
docs: Asynchronously update the sticky headline for a service.
  
          Args:
              name (string): The name of the service
              level (int): A message level in states.*_LEVEL
              message (string): The user facing error message that will be stored
                  for the service and can be queried later.