Missing Method in AppController

Error: The action webroot is not defined in controller AppController

Error: Create AppController::webroot() in file: app\controllers\app_controller.php.

<?php
class AppController extends AppController {

	var $name = 'App';


	function webroot() {

	}

}
?>

Notice: If you want to customize this error message, create app\views\errors\missing_action.ctp.