code: def patch(self, client=None):
          
          # Special case: For buckets, it is possible that labels are being
          # removed; this requires special handling.
          if self._label_removals:
              self._changes.add("labels")
              self._properties.setdefault("labels", {})
              for removed_label in self._label_removals:
                  self._properties["labels"][removed_label] = None
  
          # Call the superclass method.
          return super(Bucket, self).patch(client=client)
docs: Sends all changed properties in a PATCH request.
  
          Updates the ``_properties`` with the response from the backend.
  
          If :attr:`user_project` is set, bills the API request to that project.
  
          :type client: :class:`~google.cloud.storage.client.Client` or
                        ``NoneType``
          :param client: the client to use.  If not passed, falls back to the
                         ``client`` stored on the current object.