anchor.diff:  start_link() -> 
       spawn_link(fun() -> loop(queue:new()) end).
   
  -in(Pid, MFA) ->
  +queue(Pid, MFA) ->
       Pid ! {self(), {in, MFA}},
       receive
           Any -> Any
       end.
  +
  +clear(Pid) -> Pid ! clear.
   
   %%%============================================================================
   %%% Internal functions
  
positive.code:                 empty -> ok
              end,
              loop(NewQueue);
          _Junk -> loop(Queue)
      end.
  
  execute(Aq, MFA) ->
  
negative.code: -module(aq).
  
  %% API
  -export([start_link/0, queue/2]).
  
  %%%============================================================================
  %%% API
  