/* (non-Javadoc)
  * @see org.eclipse.emf.compare.ui.viewer.content.part.IModelContentMergeViewerTab#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
  */
 public void addSelectionChangedListener(ISelectionChangedListener selectionChangedListener) {
   viewer.addSelectionChangedListener(selectionChangedListener);
 }