Use checker member for isGranted call

[airbundle] / Resources / public / css / irishgrover.css

@font-face {
        font-family: 'Irish Grover';
        font-style: normal;
        font-weight: 400;
        src: local('Irish Grover Regular'), local('IrishGrover-Regular'), url(/bundles/rapsysair/ttf/irishgrover.v10.ttf) format('truetype');
}