code: def update_annotations_on_build(self, build_id, annotations):
          
          return self.adjust_attributes_on_object('builds', build_id,
                                                  'annotations', annotations,
                                                  self._update_metadata_things)
docs: set annotations on build object
  
          :param build_id: str, id of build
          :param annotations: dict, annotations to set
          :return: