}
    }

    private
    val messageCollector: MessageCollector
        get() = PrintingMessageCollector(System.out, MessageRenderer.PLAIN_RELATIVE_PATHS, false)

    fun <T : Any> mapParsedKotlinFiles(vararg sourceRoots: File, block: (KtFile) -> T): List<T> =
        withParsedKotlinSource(sourceRoots.toList()) { ktFiles ->
            ktFiles.map(block)
        }

        if (!sourceFile.name.endsWith(".kt")) return emptyMap()

        val versionsToIncubating = mutableMapOf<Version, MutableSet<IncubatingDescription>>()
        KotlinSourceParser().mapParsedKotlinFiles(sourceFile) { ktFile ->
            ktFile.forEachIncubatingDeclaration { declaration ->
                versionsToIncubating
                    .getOrPut(declaration.sinceVersion) { mutableSetOf() }