code: def update(self, **kwargs):
          
          self._set_stream_parameters(**kwargs)
          transformed = self.transform()
          if transformed:
              self._set_stream_parameters(**transformed)
docs: The update method updates the stream parameters (without any
          renaming applied) in response to some event. If the stream has a
          custom transform method, this is applied to transform the
          parameter values accordingly.
  
          To update and trigger, use the event method.