private static void writeMessage(DealerSocket output, DistributedAppMessage appMessage)
{
output.SendFrame(appMessage.Id.ToString(), more: true);
output.SendFrameEmpty(more: true);
output.SendFrame(appMessage.Method ?? string.Empty, more: true);
output.SendFrameEmpty(more: true);
output.SendFrame(appMessage.Data, more: true);
output.SendFrameEmpty(more: true);
output.SendFrame(appMessage.RequestId.ToString());
}