return acceptOrReject(c, changes, Violation.error(c, " methods removed in internal super class"))
    }

    private Set<CtMethod> collectAllPublicApiMethods(CtClass c) {
        Set<CtMethod> result = [] as Set
        collect(result, c)
        return result
    }

    private void collect(Set<CtMethod> result, CtClass c) {
        if (c == null) {
            return
        }