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
internalReconcileParentItems(parentItems);
	}
	/**
	 * Sets the expanded state of all items to correspond to the given set of
	 * expanded elements.
	 * 
	 * @param expandedElements
	 *            the set (element type: <code>Object</code>) of elements
	 *            which are expanded
	 * @param widget
	 *            the widget
	 */
	private void internalSetExpanded(CustomHashtable expandedElements,
			Widget widget) {
		Item[] items = getChildren(widget);
		for (int i = 0; i < items.length; i++) {
			Item item = items[i];
			Object data = item.getData();
			if (data != null) {
				
				
				boolean expanded = expandedElements.remove(data) != null;
				if (expanded != getExpanded(item)) {
					if (expanded) {
						createChildren(item);
					}
					setExpanded(item, expanded);
				}
			}
			if (expandedElements.size() > 0) {