private @Nullable T nextOrNull;

  /**
   * Creates a new iterator with the given first element, or, if {@code firstOrNull} is null,
   * creates a new empty iterator.
   */
  protected AbstractSequentialIterator(@Nullable T firstOrNull) {
    this.nextOrNull = firstOrNull;
  }

  /**
   * Returns the element that follows {@code previous}, or returns {@code null} if no elements

  private @Nullable T nextOrNull;

  /**
   * Creates a new iterator with the given first element, or, if {@code firstOrNull} is null,
   * creates a new empty iterator.
   */
  protected AbstractSequentialIterator(@Nullable T firstOrNull) {
    this.nextOrNull = firstOrNull;
  }

  /**
   * Returns the element that follows {@code previous}, or returns {@code null} if no elements

    val issuer = cert.issuerX500Principal
    val subjectCaCerts = subjectToCaCerts[issuer] ?: return null

    return subjectCaCerts.firstOrNull {
      try {
        cert.verify(it.publicKey)
        return@firstOrNull true
      } catch (_: Exception) {
        return@firstOrNull false
      }
    }
  }

  override fun equals(other: Any?): Boolean =
    other === this ||

) {
  val commonName: Any?
    get() {
      return tbsCertificate.subject
        .flatten()
        .firstOrNull { it.type == ObjectIdentifiers.COMMON_NAME }
        ?.value
    }

  val organizationalUnitName: Any?
    get() {
      return tbsCertificate.subject
        .flatten()
        .firstOrNull { it.type == ObjectIdentifiers.ORGANIZATIONAL_UNIT_NAME }
        ?.value
    }

    constructorsSupplier.get().firstOrNull { c -> jvmSignature == c.signature?.toString() }?.let { predicate.match(it) } ?: false


private
fun hasFunctionAttribute(functionsSupplier: Supplier<MutableList<KmFunction>>, jvmSignature: String, predicate: AttributePredicate) =
    functionsSupplier.get().firstOrNull {
        jvmSignature == it.signature?.toString()

     */
    fun sourceFileAndSourceRootFor(sourceFilePath: String): Pair<File, File> =
        sourceRoots.asSequence()
            .map { it.resolve(sourceFilePath) to it }
            .firstOrNull { it.first.isFile }
            ?: error("Source file '$sourceFilePath' not found, searched in source roots:\n  - ${sourceRoots.joinToString("\n  - ")}")

    private
    val KtFile.normalizedPath: String?

    return OkHttpDebugLogging.enable(
      "javax.net.ssl",
      object : Handler() {
        override fun publish(record: LogRecord) {
          val param = record.parameters?.firstOrNull() as? String
          debugHandler(JsseDebugMessage(record.message, param))
        }

        override fun flush() {
        }

        override fun close() {
        }
      },
    )
  }

        Jsoup.connect(buildToolsUrl)
            .get()
            .select("section:has(> h3#kts)")
            .first()
            ?.text()
            ?.lines()
            ?.firstOrNull { it.contains("buildToolsVersion = ") }
            ?.substringAfter("buildToolsVersion = ")
            ?.trim('"', ' ')
            ?: error("Couldn't find buildToolsVersion on $buildToolsUrl")

    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.")