code: def abort(self):
          
          LOG.debug('Aborting PB %s', self._id)
          self.set_status('aborted')
          pb_type = DB.get_hash_value(self.key, 'type')
          key = '{}:active'.format(self._type)
          DB.remove_from_list(key, self._id)
          key = '{}:active:{}'.format(self._type, pb_type)
          DB.remove_from_list(key, self._id)
          key = '{}:aborted'.format(self._type)
          DB.append_to_list(key, self._id)
          key = '{}:aborted:{}'.format(self._type, pb_type)
          DB.append_to_list(key, self._id)
          self._mark_updated()
docs: Abort the processing_block.