Call to undefined method AppHttpControllersSentry::check()

Route::group(array('before' => 'superadmin'), function()
{
    Route::get('/','HomeController@main');

});

class HomeController extends BaseController {

 //Some codes here
}

use SentrySentryLaravelSentryLaravel;
class Sentry extends SentryLaravel
{

}

class BaseController extends Controller {

    /**
     * Setup the layout used by the controller.
     *
     * @return void
     */
    public $data = array();

    public function __construct()
    {
        if (Sentry::check())
        {
            // User is not logged in, or is not activated
             $this->data['admin'] = Sentry::getUser();
        }
    }

    protected function setupLayout()
    {
        if ( ! is_null($this->layout))
        {
            $this->layout = View::make($this->layout);
        }
    }

}