CSS Expression to GSS for Conditional Property in GWT?

Question

How can I transform the following GWT CSS part into the GWT GSS?

@if (test.mobile.client.Parameter.getWindowWidth() >= 414) {
 .previewBox {
    width: 33.333333%;
 }
}

Answer 1

@if (eval("test.mobile.client.Parameter.getWindowWidth() >= 414")) {
    .previewBox {
        width: 33.333333%;
    }
}