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
if(getContentProvider() instanceof ILazyTreeContentProvider) {
    		return new Object[0];
    	}
    	return super.getRawChildren(parent);
    }
    /**
     * For a TreeViewer with a tree with the VIRTUAL style bit set, set the
     * number of children of the given element. To set the number of children
     * of the invisible root of the tree, the input object is passed as the
     * element.
     * 
     * @param element
     * @param count
     * 
	 * <strong>EXPERIMENTAL</strong>. This class or interface has been added as
	 * part of a work in progress. There is no guarantee that this API will remain
	 * unchanged during the 3.2 release cycle. Please do not use this API without
	 * consulting with the Platform/UI team.
	 * </p>
     * 
     * @since 3.2
     */
	public void setChildCount(Object element, int count) {
		Tree tree = (Tree) doFindInputItem(element);
		if (tree != null) {
			tree.setItemCount(count);
			return;
		}
		Widget[] items = findItems(element);
		for (int i = 0; i < items.length; i++) {