public boolean classHasValidStyles(Class clazz) {
        for (var style : classStyleMap.get(clazz)) {
            if (style.hasAllNullFields() || !style.hasMandatoryFields()) {
                return false;
            }
        }
        
        return true;
    }
Exports skin data to a JSON file to be loaded by libGDX.
@param fileHandle
@return
core/src/com/ray3k/skincomposer/data/JsonData.java