replaceWith = ReplaceWith("body.readUtf8()"),
    level = DeprecationLevel.WARNING,
  )
  fun getUtf8Body(): String = body.readUtf8()

  fun getHeader(name: String): String? = headers.values(name).firstOrNull()

  override fun toString(): String = requestLine

            error("Can't find the contributors section in the release notes $releaseNotes.")
        }

        val contributorSectionEndIndex = (contributorSectionBeginIndex until releaseNotesLines.size).firstOrNull {
            val line = releaseNotesLines[it].trim()
            line.isNotEmpty() && !line.startsWith("[")
        } ?: error("Can't find the contributors section end in the release notes $releaseNotes.")

  /** Returns the remote peer's principle, or null if that peer is anonymous. */
  @get:JvmName("peerPrincipal")
  val peerPrincipal: Principal?
    get() = (peerCertificates.firstOrNull() as? X509Certificate)?.subjectX500Principal

  @JvmName("-deprecated_peerPrincipal")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "peerPrincipal"),

                            if (versionsOfPatch.any { it.contains("-RC") }) {
                                add(versionsOfPatch.firstOrNull { it.contains("-RC") })
                            } else if (versionsOfPatch.any { it.contains("-Beta") }) {
                                add(versionsOfPatch.firstOrNull { it.contains("-Beta") })
                            }
                        }
                    }
                }

    val name = this.name
    return incoming.files.elements.map {
        require(it.size <= 1) {
            "Expected at most one file in configuration '$name' but found: $it"
        }
        it.firstOrNull()?.asFile
    }
}

fun NamedDomainObjectProvider<Configuration>.getSingleFileProvider(): Provider<File> {
    return this.flatMap { configuration ->
        configuration.getSingleFileProvider()
    }

  @BeforeEach
  internal fun setUp() {
    val inetAddresses = InetAddress.getAllByName("localhost")
    localhostIpv4 = inetAddresses.firstOrNull { it is Inet4Address }
      ?: throw TestAbortedException()
    localhostIpv6 = inetAddresses.firstOrNull { it is Inet6Address }
      ?: throw TestAbortedException()

    serverIpv4 = MockWebServer()
    serverIpv4.start(localhostIpv4, 0) // Pick any available port.

  return SuiteId(id, matcher.groupValues[3])
}

class IanaSuites(
  val name: String,
  val suites: List<SuiteId>,
) {
  fun fromJavaName(javaName: String): SuiteId =
    suites.firstOrNull {
      it.name == javaName || it.name == "TLS_${javaName.drop(4)}"
    } ?: throw IllegalArgumentException("No such suite: $javaName")
}

suspend fun fetchIanaSuites(okHttpClient: OkHttpClient): IanaSuites {

      assertThat(messages).contains(failure!!.message)
    }

  fun assertFailureMatches(vararg patterns: String) =
    apply {
      val message = failure!!.message!!
      assertThat(
        patterns.firstOrNull { pattern ->
          message.matches(pattern.toRegex())
        },
      ).isNotNull()
    }

  fun assertSentRequestAtMillis(
    minimum: Long,
    maximum: Long,
  ) = apply {

            null
        } else {
            val testCoverages = model.stages.flatMap { it.functionalTests }
            val foundTestCoverage =
                testCoverages.firstOrNull {
                    it.testType == TestType.PLATFORM &&
                        it.os == testCoverage.os &&
                        it.arch == testCoverage.arch &&

        val peekedHeader =
          reader.peekHeader()
            ?: throw ProtocolException("expected a value at $reader")

        val choice =
          choices.firstOrNull { it.matches(peekedHeader) }
            ?: throw ProtocolException(
              "expected a matching choice but was $peekedHeader at $reader",
            )

        return choice to choice.fromDer(reader)