How to preserve css class name through GWT compilation?

Question

How to preserve css style names used in UiBinder files (*.ui.xml) and prevent them to be obfuscated to something like this GEMOY02DD3B?

Answer 1

Use @external GWT specific CSS at-rule followed by list of class names to declare classes that shouldn't be obfuscated.

Documented in javadoc of CssResource.

E.g.

<ui:style>
    @external floatingLeft;

    .floatingLeft {
        float: left;
    }
</ui:style>