title: Callbacks are not supported when broadcasting
body: <p>Here I am facing one issue with Callbacks in socket.io with nodejs  </p>
  
  <pre><code>io.sockets.to(usersocketid).emit('receivemsg', 
  {'success':'1','data':message},function(deliverycb){ 
      console.log('delivery call back');
      console.log(deliverycb);
  });
  </code></pre>
  
  <p>Where i am facing error of Callbacks are not supported when broadcasting so anyone have solution of this.</p>