}

    fun cipherSuites(vararg cipherSuites: CipherSuite): Builder =
      apply {
        require(tls) { "no cipher suites for cleartext connections" }
        val strings = cipherSuites.map { it.javaName }.toTypedArray()
        return cipherSuites(*strings)
      }

    fun cipherSuites(vararg cipherSuites: String) =
      apply {
        require(tls) { "no cipher suites for cleartext connections" }