Bug 156883 [Viewers] enhancements to ILazyTreeContentProvider
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
}
		super.internalInitializeTree(tree);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#updatePlus(org.eclipse.swt.widgets.Item,
	 *      java.lang.Object)
	 */
	protected void updatePlus(Item item, Object element) {
		if (getContentProvider() instanceof ILazyTreeContentProvider) {
			ILazyTreeContentProvider contentProvider = (ILazyTreeContentProvider) getContentProvider();
			Object data = item.getData();
			int itemCount = 0;
			if (data != null) {
				
				itemCount = ((TreeItem) item).getItemCount();
			}
			contentProvider.updateChildCount(element, itemCount);
		} else {
			super.updatePlus(item, element);
		}
	}
	/**
	 * Removes the element at the specified index of the parent.  The selection is updated if required.
	 * 
	 * @param parentOrTreePath the parent element, the input element, or a tree path to the parent element 
	 * @param index child index
	 * @since 3.3
	 */