YII2 nav widget open link in new tab/window and how to link to external link

echo Nav::widget([

'options'=> ['class'=> 'nav navbar-left nav-tabs'],

'items'=> [

        [

'label'=> 'Schedule An Appointment', 

'url'=> 'http://google.com',

'linkOptions'=> ['target'=> '_blank'] 

        ],

    ],

]);