code: public boolean executeAsync(ProcedureCallback callback, String procedure, Object... parameters) throws Exception
      {
          return this.Client.callProcedure(new TrackingCallback(this, procedure, callback), procedure, parameters);
      }
docs: Executes a procedure asynchronously, then calls the provided user callback with the server response upon completion.
  
  @param callback the user-specified callback to call with the server response upon execution completion.
  @param procedure the name of the procedure to call.
  @param parameters the list of parameters to pass to the procedure.
  @return the result of the submission false if the client connection was terminated and unable to post the request to the server, true otherwise.