src/main/java/org/deephacks/tools4j/cli/Utils.java
static void validateArgs(List<Object> args, Object instance, Method m, Command cmd) {
        if (!onClasspath(JSR303_1_1_CLASSNAME)) {
            return;
        }
        try {
            Object validator = getValidator();
            Method validate = validator.getClass().getMethod("validateArgs", List.class,
                    Object.class, Method.class, Command.class);
            validate.invoke(validator, args, instance, m, cmd);
        } catch (InvocationTargetException e) {
            if (e.getTargetException() instanceof RuntimeException) {
                throw (RuntimeException) e.getCause();
            }
            throw new RuntimeException(e.getCause());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
static void validateArgs(List<Object> args, Object instance, Method m, Command cmd) {
        if (!onClasspath(JSR303_1_1_CLASSNAME)) {
            return;
        }
        try {
            Object validator = getValidator();
            Method validate = validator.getClass().getMethod("validateArgs", List.class,
                    Object.class, Method.class, Command.class);
            validate.invoke(validator, args, instance, m, cmd);
        } catch (InvocationTargetException e) {
            if (e.getTargetException() instanceof RuntimeException) {
                throw (RuntimeException) e.getCause();
            }
            throw new RuntimeException(e.getCause());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
Validate that the method parameters if Bean Validation 1.1 is available
on classpath.