class Devicetree {

    private Devicetree() {
    }

    /**
     * Query the model from the devicetree
     *
     * @return The model if available, null otherwise
     */
    public static String queryModel() {<FILL_FUNCTION_BODY>}
}

        String modelStr = FileUtil.getStringFromFile(SysPath.MODEL);
        if (!modelStr.isEmpty()) {
            return modelStr.replace("Machine: ", "");
        }
        return null;
    
<no_super_class>