List<String> overriddenMethods = Stream.of(FileToRawModelMerger.class.getDeclaredMethods())
                .map(Method::getName)
                .filter(m -> m.startsWith("merge"))
                .collect(Collectors.toList());

        assertTrue(
                overriddenMethods.containsAll(methodNames),
                "Expected overriddenMethods " + overriddenMethods + " to contain all methodNames " + methodNames);