sminnee / silverstripe-framework

				Debug::message("Action not set; using default action method name 'index'");

			}

			$action = "index";

		} else if(!is_string($action)) {

			user_error("Non-string method name: " . var_export($action, true), E_USER_ERROR);

		}

		$classMessage = Director::isLive() ? 'on this handler' : 'on class '.get_class($this);

function singleton($className) {

	if($className == "Config") user_error("Don't pass Config to singleton()", E_USER_ERROR);

	if(!isset($className)) user_error("singleton() Called without a class", E_USER_ERROR);

	if(!is_string($className)) user_error("singleton() passed bad class_name: " . var_export($className,true),

		E_USER_ERROR);

	return Injector::inst()->get($className);

}