anchor.diff:  
   -include("config.hrl").
   -include("ddfs.hrl").
  +-include("ddfs_tag.hrl").
   -include("ddfs_gc.hrl").
   
   -spec abort(term(), atom()) -> no_return().
  
positive.code: urls_are_hosted([Urls|Rest], Host, Node) ->
      Hosted =
          lists:foldl(
            fun (<<"tag://", _/binary>> = T, false) ->
                    tag_is_hosted(T, Host, Node, ?MAX_TAG_OP_RETRIES);
                (Url, false) ->
                    case ddfs_util:parse_url(Url) of
  
negative.code:             E
      end.
  
  -spec urls_are_hosted([[url()]], host(), node())
                       -> boolean() | {'error' | term()}.
  urls_are_hosted([], _Host, _Node) ->
      false;
  