title: SWT/JFace: remove widgets
body: <pre><code>Group group = new Group(parent, SWT.NONE);
  StyledText comment = new StyledText(group, SWT.BORDER_DASH);
  </code></pre>
  
  <p>This creates a group with a text area inside.</p>
  
  <p>How can I later delete the text (remove it from the screen so that I can replace it with something else)?</p>