fun classBytesFor(sourceName: String): ByteArray? =
        classBytesSupplierForSourceName(sourceName)?.let { it() }

    /**
     * All found class files bytes by Kotlin source name.
     */
    fun allClassesBytesBySourceName(): Sequence<Pair<String, ClassBytesSupplier>> =
        relevantClassPathFiles.asSequence()
            .flatMap { sourceNamesFrom(it) }
            .mapNotNull { sourceName ->