anchor.diff:          {_,_} -> Undef
       end.
   
  -edoc_filter(Undef) ->
  -    %% Filter away function call that is catched.
  -    filter(fun({{edoc_lib,uri_get_http,1},{http,request_sync,2}}) -> false;
  -              (_) -> true
  -           end, Undef).
  -
   eunit_filter(Undef) ->
       filter(fun({{eunit_test,wrapper_test_exported_,0},
                   {eunit_test,nonexisting_function,0}}) -> false;
  
positive.code: %%
  %% %CopyrightBegin%
  %%
  %% Copyright Ericsson AB 2000-2018. All Rights Reserved.
  %%
  %% Licensed under the Apache License, Version 2.0 (the "License");
  %% you may not use this file except in compliance with the License.
  
negative.code:                       [UndefS,ExcludeFrom]),
      {ok,Undef0} = xref:q(Server, lists:flatten(Q)),
      Undef1 = hipe_filter(Undef0),
      Undef3 = ssl_crypto_filter(Undef1),
      Undef4 = eunit_filter(Undef3),
      Undef5 = dialyzer_filter(Undef4),
      Undef6 = wx_filter(Undef5),
  