docs: def clear_all(self):
          """
          Deletes all ``sandsnake`` related data from redis.
  
          .. warning::
  
              Very expensive and destructive operation. Use with causion
          """
          keys = self._analytics_backend.keys()
  
          for key in itertools.chain(*keys):
              with self._analytics_backend.map() as conn:
                  if key.startswith(self._prefix):
                      conn.delete(key)