protected boolean isInternal(CtClass c) {
        if (c.name.startsWith("java.")) {
            return false
        } else if (c.name.contains('.internal.')) {
            return true
        } else {
            return !publicApiPatterns.any { it.matcher(c.name).find() }
        }
    }

        // Otherwise, skip this commit.
        List<String> p1Branches = branchesOf(parentCommits[0])
        List<String> p2Branches = branchesOf(parentCommits[1])

        if (p1Branches.contains("origin/master") && !p2Branches.contains("origin/master") && p2Branches.any { it.startsWith("origin/release") }) {
            List<String> badFiles = MONITORED_FILES.grep { isBadFileInMergeCommit(it, commit, parentCommits[0], parentCommits[1]) }

        if (currentlyBuilding.contains(className)) {
            throw new RuntimeException("Cycle building $className. Currently building $currentlyBuilding")
        }
        currentlyBuilding.addLast(className)
        try {
            ClassMetaData classMetaData = classMetaData.find(className)
            if (!classMetaData) {
                if (!className.contains('.internal.')) {