code: def update_review(self, review_patch, pub_name, ext_name, review_id):
          
          route_values = {}
          if pub_name is not None:
              route_values['pubName'] = self._serialize.url('pub_name', pub_name, 'str')
          if ext_name is not None:
              route_values['extName'] = self._serialize.url('ext_name', ext_name, 'str')
          if review_id is not None:
              route_values['reviewId'] = self._serialize.url('review_id', review_id, 'long')
          content = self._serialize.body(review_patch, 'ReviewPatch')
          response = self._send(http_method='PATCH',
                                location_id='e6e85b9d-aa70-40e6-aa28-d0fbf40b91a3',
                                version='5.1-preview.1',
                                route_values=route_values,
                                content=content)
          return self._deserialize('ReviewPatch', response)
docs: UpdateReview.
          [Preview API] Updates or Flags a review
          :param :class:`<ReviewPatch> <azure.devops.v5_1.gallery.models.ReviewPatch>` review_patch: ReviewPatch object which contains the changes to be applied to the review
          :param str pub_name: Name of the pubilsher who published the extension
          :param str ext_name: Name of the extension
          :param long review_id: Id of the review which needs to be updated
          :rtype: :class:`<ReviewPatch> <azure.devops.v5_1.gallery.models.ReviewPatch>`