Bug 133375 [Viewers] Need access to the element comparer of a tree selection
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeSelection.java
* @param comparer 
	 *            the comparer, or <code>null</code> if default equals is to be used
	 */
	public TreeSelection(TreePath treePath, IElementComparer comparer) {
		this(treePath != null ? new TreePath[] { treePath } : EMPTY_TREE_PATHS, comparer);
	}
	
	/**
	 * Creates a new tree selection based on the initialization data.
	 * 
	 * @param data the data
	 */
	private TreeSelection(InitializeData data) {
		super(data.selection);
		paths= data.paths;
		element2TreePaths= data.element2TreePaths;
	}
	/**
	 * Creates a new empty selection. See also the static field
	 * <code>EMPTY</code> which contains an empty selection singleton.
	 * <p>
	 * Note that TreeSelection.EMPTY is not equals() to StructuredViewer.EMPTY.
	 * </p>
	 * 
	 * @see #EMPTY
	 */
	public TreeSelection() {
		super();
	}
	/*