public static List<Method> unmaskedMethodsFromSuperclass(Class<?> testClass) {
        return unmaskedMethods(testClass, testClass.getSuperclass());
    }
Check testClass overrides all protected, public and package private
methods of its immediate super class. See unmaskedMethods().

@param testClass the class to check whether completely masks its super class
@return the methods missing from testClass to completely override its
        immediate super class
vespajlib/src/main/java/com/yahoo/protect/ClassValidator.java