silverstripe-cms/code/LeftAndMainDecorator.php

<?php
/**
 * Plug-ins for additional functionality in your LeftAndMain classes.
 * 
 * @package cms
 * @subpackage core
 */
abstract class LeftAndMainDecorator extends Extension {

	function init() {
	}
	
	function accessedCMS() {
	}
	
	function augmentNewSiteTreeItem(&$item) {
	}

}

?>