title: How to get DiscussionHistory for MultiUserChat room using aSmack?
body: <p>How to get the <em>DiscussionHistory  of a MUC room</em> from <code>MultiUserChat</code>? I am able to create MultiUserChat instance and room by using aSmack library, now I want to show all the previous conversations that happened in the room.</p>
  
  <p>Anybody experienced in the same please help me. I Google searched a lot about this but still I did't get any proper documentation / explanation on this.</p>