code: def result(self, timeout=None):
          
          self._blocking_poll(timeout=timeout)
  
          if self._exception is not None:
              # pylint: disable=raising-bad-type
              # Pylint doesn't recognize that this is valid in this case.
              raise self._exception
  
          return self._result
docs: Get the result of the operation, blocking if necessary.
  
          Args:
              timeout (int):
                  How long (in seconds) to wait for the operation to complete.
                  If None, wait indefinitely.
  
          Returns:
              google.protobuf.Message: The Operation's result.
  
          Raises:
              google.api_core.GoogleAPICallError: If the operation errors or if
                  the timeout is reached before the operation completes.