code: async def save(self):
          
          old_tags = list(self._orig_data['tags'])
          new_tags = list(self.tags)
          self._changed_data.pop('tags', None)
          await super(BlockDevice, self).save()
          for tag_name in new_tags:
              if tag_name not in old_tags:
                  await self._handler.add_tag(
                      system_id=self.node.system_id, id=self.id, tag=tag_name)
              else:
                  old_tags.remove(tag_name)
          for tag_name in old_tags:
              await self._handler.remove_tag(
                  system_id=self.node.system_id, id=self.id, tag=tag_name)
          self._orig_data['tags'] = new_tags
          self._data['tags'] = list(new_tags)
docs: Save this block device.