anchor.diff:  -export([help/0, ts/0, td/0, su/0]).
   -export([di/0, di/1, di/2, dc/0]).
   -export([ll/1, ll/2, ql/2, ql/3, ql/4]).
  +%%remove after debugging
  +-export([service_name/1]).
   
   -include("ocs.hrl").
   -include("ocs_log.hrl").
  
positive.code: snodes([], Acc) ->
  	lists:reverse(Acc).
  
  
negative.code: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %%% @copyright 2016 - 2021 SigScale Global Inc.
  %%% @end
  %%% Licensed under the Apache License, Version 2.0 (the"License");
  %%% you may not use this file except in compliance with the License.
  %%% You may obtain a copy of the License at
  %%%
  %%%     http://www.apache.org/licenses/LICENSE-2.0
  %%%
  %%% Unless required by applicable law or agreed to in writing, software
  %%% distributed under the License is distributed on an"AS IS" BASIS,
  %%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  %%% See the License for the specific language governing permissions and
  %%% limitations under the License.
  