code: function storeResponse(message, id, dest)
    {
      var response =
      {
        message: message,
        /** Timeout to auto-clean old responses */
        timeout: setTimeout(function()
        {
          responses.remove(id, dest);
        },
        response_timeout)
      };
  
      responses.set(response, id, dest);
    }
docs: Store the response to prevent to process duplicate request later