public ReturnType getReply()
public ReturnType getReply() throws DBusExecutionException
   public ReturnType getReply()   {      if (null != rval) return rval;      else if (null != error) throw error;      checkReply();      if (null != rval) return rval;      else if (null != error) throw error;      else throw new NoReply("Async call has not had a reply");   }