public static SvgToggleButton create(final Preset onPreset,
                                         final Preset offPreset) {
        return new SvgToggleButton(onPreset, offPreset);
    }
@param onPreset  The face to display when in the ON state, e.g. an OFF icon
@param offPreset The face to display when in the OFF state, e.g. an ON icon
stroom-core-client-widget/src/main/java/stroom/widget/button/client/SvgToggleButton.java