Bug 171649 [Viewers] AbstractTreeViewerisExpandable(elementOrTreePath) is not called when using a ITreePathContentProvider
Build ID: 3.3M3 More information: see AbstractTreeViewer.java, line 1974, the content provider hasChildren() should not be called directly
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* Adds the given SWT selection listener to the given SWT control.
	 * 
	 * @param control
	 *            the SWT control
	 * @param listener
	 *            the SWT selection listener
	 * @deprecated
	 */
	protected void addSelectionListener(Control control,
			SelectionListener listener) {
		
	}
	/**
	 * Adds a listener for expand and collapse events in this viewer. Has no
	 * effect if an identical listener is already registered.
	 * 
	 * @param listener
	 *            a tree viewer listener
	 */
	public void addTreeListener(ITreeViewerListener listener) {
		treeListeners.add(listener);
	}
	/**
	 * Adds the given SWT tree listener to the given SWT control.
	 * 
	 * @param control
	 *            the SWT control
	 * @param listener
	 *            the SWT tree listener
	 */