Bug 126061 [Viewers] Need to document that virtual tables and trees ignore sorters and filters
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
* configured with {@link TreeColumn} objects in this case. 
	 * </p>
	 * <p>
	 * If the label provider is an <code>ILabelProvider</code>, then it
	 * provides only the label text and image for the first column, and any
	 * remaining columns are blank. Implementers of <code>ILabelProvider</code>
	 * may also implement {@link IColorProvider} and/or {@link IFontProvider} to
	 * provide colors and/or fonts.
	 * </p>
	 */
	public void setLabelProvider(IBaseLabelProvider labelProvider) {
		Assert.isTrue(labelProvider instanceof ITableLabelProvider
				|| labelProvider instanceof ILabelProvider);
		super.setLabelProvider(labelProvider);
		treeColorAndFont = new TreeColorAndFontCollector(labelProvider);
	}
	/*
	 * (non-Javadoc) Method declared in AbstractTreeViewer.
	 */
	protected void setSelection(List items) {
		Item[] current = getSelection(getTree());
		
		if (isSameSelection(items, current)) {
			return;
		}
		TreeItem[] newItems = new TreeItem[items.size()];
		items.toArray(newItems);
		getTree().setSelection(newItems);
	}
	/**