overridingMethods on Java class methods does not work properly

[LABSARI]

class A {
    void foo() {
        System.out.println("A.foo");
    }
}

class B extends A {
    @Override
    void foo() {
        System.out.println("B.foo");
    }
}

// Class C, subclass of B, also overrides foo
class C extends B {
    @Override
    void foo() {
        System.out.println("C.foo");
    }
}

In this example, A.foo is overriden by B.foo and C.foo.
overridingMethods on A.foo returns only B.foo.
It should return both B.foo and C.foo. It should not stop to look down when it finds an overriding method.