.flatMap { sourceNamesFrom(it) }
            .mapNotNull { sourceName ->
                classBytesSupplierForSourceName(sourceName)?.let { sourceName to it }
            }

    private
    fun classBytesSupplierForSourceName(sourceName: String): ClassBytesSupplier? =
        classFilePathCandidatesFor(sourceName)
            .mapNotNull(::classBytesSupplierForFilePath)
            .firstOrNull()

    private

  val suites =
    call.executeAsync().use {
      if (!it.isSuccessful) {
        throw IOException("Failed ${it.code} ${it.message}")
      }
      it.body
        .string()
        .lines()
        .mapNotNull { parseIanaCsvRow(it) }
    }

  return IanaSuites("current", suites)

        val objectMethods = Any::class.java.declaredMethods.toList()
        return receiverType
            .memberFunctions
            .asSequence()
            .mapNotNull { it.javaMethod }
            .filterNot { objectMethods.contains(it) }
            .map { it.toGroovyScriptString() }
            .sorted()
            .joinToString(separator = "\n")
    }

    private

  open fun getHandshakeServerNames(sslSocket: SSLSocket): List<String> {
    val session = sslSocket.session as? ExtendedSSLSession ?: return listOf()
    return try {
      session.requestedServerNames.mapNotNull { (it as? SNIHostName)?.asciiName }
    } catch (uoe: UnsupportedOperationException) {
      // UnsupportedOperationException – if the underlying provider does not implement the operation