code: def _prime_user_perm_caches(self):
          
          perm_cache, group_perm_cache = self._get_user_cached_perms()
          self.user._authority_perm_cache = perm_cache
          self.user._authority_group_perm_cache = group_perm_cache
          self.user._authority_perm_cache_filled = True
docs: Prime both the user and group caches and put them on the ``self.user``.
          In addition add a cache filled flag on ``self.user``.