MethodClosure for a protected method in a super class not working properly

public class A {
    public MethodClosure createMethodClosure() {
        return new MethodClosure(this, "someMethod");
    }

    protected void someMethod(int someParameter) {}
}

public class B extends A {
}

public class Test {
    public static void main(String[] args) {
        System.out.println(new A().createMethodClosure().getMaximumNumberOfParameters());
        System.out.println(new B().createMethodClosure().getMaximumNumberOfParameters());
    }
}