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() }