anchor.diff:  
   init([{'__gen_listener_tcp_mod', Module} | InitArgs]) ->
       process_flag(trap_exit, true),
  -
  -    error_logger:info_msg("About to call gen_tcp:listen()"),
   
       case Module:init(InitArgs) of
           {ok, {Port, Options}, ModState} ->
  
positive.code: 	 reply/2
  	]).
  
  -export([
  	 init/1,
  	 handle_call/3,
  
negative.code: %% 
  %% Copyright (c) 2008-2010, Essien Ita Essien
  %% All rights reserved.
  %% 
  %% Redistribution and use in source and binary forms, 
  %% with or without modification, are permitted 
  %% provided that the following conditions are met:
  %%
  %%    * Redistributions of source code must retain the 
  %%      above copyright notice, this list of conditions 
  %%      and the following disclaimer.
  %%    * Redistributions in binary form must reproduce 
  %%      the above copyright notice, this list of 
  %%      conditions and the following disclaimer in the 
  %%      documentation and/or other materials provided with 
  %%      the distribution.
  %%    * Neither the name "JsonEvents" nor the names of its 
  %%      contributors may be used to endorse or promote 
  %%      products derived from this software without 
  %%      specific prior written permission.
  %%
  %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
  %% CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 
  %% WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
  %% WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
  %% PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
  %% HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
  %% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
  %% (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
  %% GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 
  %% BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
  %% LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
  %% (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
  %% THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
  %% OF SUCH DAMAGE.
  %% 
  
  -module(gen_listener_tcp).
  -behaviour(gen_server).
  
  