Missing Method in IntroductionsController

Error: The action 01_app is not defined in controller IntroductionsController

Error: Create IntroductionsController::01_app() in file: app/controllers/introductions_controller.php.

<?php
class IntroductionsController extends AppController {

	var $name = 'Introductions';


	function 01_app() {

	}

}
?>

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