docs: def cached_unless_authenticated(timeout=50, key_prefix='default'):
      """Cache anonymous traffic."""
      def caching(f):
          @wraps(f)
          def wrapper(*args, **kwargs):
              cache_fun = current_cache.cached(
                  timeout=timeout, key_prefix=key_prefix,
                  unless=lambda: current_cache_ext.is_authenticated_callback())
              return cache_fun(f)(*args, **kwargs)
          return wrapper
      return caching