Disabling Link

My question is how to disable a particular for multiple user class. Currently I am doing in the following way in layouts/main.php

array('label'=>'Users', 'url'=>array('/user/index'), 'visible'=>Yii::app()->user->checkAccess('admin'))/*'

But what if I want to allow another class called superadmin then how should I do it?

I can’t do it like this

array('label'=>'Users', 'url'=>array('/user/index'), 'visible'=>Yii::app()->user->checkAccess('admin'), 'visible'=>Yii::app()->user->checkAccess('superadmin'))/*

'visible'=>Yii::app()->user->checkAccess('admin') || Yii::app()->user->checkAccess('superadmin')

Thanks for the solution. I had completely forgotten about the or operation.