Bug 315281 update copyrights for 3.6
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
protected void internalRefreshStruct(Widget widget, Object element,
			boolean updateLabels) {
		if (contentProviderIsLazy) {
			
			if (widget instanceof Tree) {
				((Tree) widget).clearAll(true);
			} else if (widget instanceof TreeItem) {
				((TreeItem) widget).clearAll(true);
			}
			int index = 0;
			Widget parent = null;
			if (widget instanceof TreeItem) {
				TreeItem treeItem = (TreeItem) widget;
				parent = treeItem.getParentItem();
				if (parent == null) {
					parent = treeItem.getParent();
				}
				if (parent instanceof Tree) {
					index = ((Tree) parent).indexOf(treeItem);
				} else {
					index = ((TreeItem) parent).indexOf(treeItem);
				}
			}
			virtualRefreshExpandedItems(parent, widget, element, index);
			return;
		}
		super.internalRefreshStruct(widget, element, updateLabels);
	}
	/**
	 * Traverses the visible (expanded) part of the tree and updates child