Missing Method in FrontendController

Error: The action 4.0 is not defined in controller FrontendController

Error: Create FrontendController::4.0() in file: app/controllers/frontend_controller.php.

<?php
class FrontendController extends AppController {

	var $name = 'Frontend';


	function 4.0() {

	}

}
?>

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