title: SWT layout which can be minimize and maximize
body: <p>I am from ZK background and new to eclipse plugin development. I have 5 labels with corresponding text-boxes and one button. I want them in a group, which can be minimize and maximize. In ZK, we have a UI widget exactly for this purpose, <a href="http://www.zkoss.org/zkdemo/layout/group_box" rel="nofollow">GroupBox</a>. To see its functionality, visit <a href="http://zkfiddle.org/sample/17h1sue/1-Groupbox-bug-nbsp-added-at-Client-because-of-indentation" rel="nofollow">ZK fiddle</a></p>
  
  <p>I am sure there must be a widget available in SWT for this functionality, just I can't find it.</p>