.filter { it.name.isClassFilePath }
                .map { kotlinSourceNameOf(it.name) }
        }

    private
    fun sourceNamesFromDir(dir: File): Sequence<String> =
        dir.walkTopDown()
            .filter { it.name.isClassFilePath }
            .map { kotlinSourceNameOf(normaliseFileSeparators(it.relativeTo(dir).path)) }

    private
    fun classBytesIndexFor(entry: Any): ClassBytesIndex =

        }
    }

    private fun containsSrcFileWithString(srcRoot: File, content: String, exceptions: List<String>): Boolean {
        srcRoot.walkTopDown().forEach { file ->
            if (file.extension == "groovy" || file.extension == "java") {
                val originalText = file.readText()
                val text = originalText.lineSequence()

                            JavaVersionsToIncubatingCollector(srcDir),
                            KotlinVersionsToIncubatingCollector()
                        )
                    )
                    srcDir.walkTopDown().forEach { sourceFile ->
                        try {
                            collector.collectFrom(sourceFile).forEach { (version, incubating) ->