* @param args
     *            array of arguments
     * @param adjustNumber
     *            if {@literal true}, converts arguments to match number types if necessary
     * @return {@literal true} if the arguments are suitable for the parameter types
     */
    protected boolean isSuitable(final Class<?>[] paramTypes, final Object[] args, final boolean adjustNumber) {
        if (args == null) {
            return paramTypes.length == 0;