val value = v.trim()
    headersCheckName(name)
    headersCheckValue(value, name)
    namesAndValues[i] = name
    namesAndValues[i + 1] = value
    i += 2
  }

  @Suppress("UNCHECKED_CAST")
  return Headers(namesAndValues as Array<String>)

  override fun getLocalPrincipal(): Principal = throw UnsupportedOperationException()

  override fun getPacketBufferSize(): Int = throw UnsupportedOperationException()

  @Suppress("UNCHECKED_CAST")
  @Throws(SSLPeerUnverifiedException::class)
  override fun getPeerCertificates(): Array<Certificate> =
    if (certificates.isEmpty()) {
      throw SSLPeerUnverifiedException("peer not authenticated")
    } else {

import java.net.ProtocolException
import okio.ByteString

/**
 * ASN.1 adapters adapted from the specifications in [RFC 5280][rfc_5280].
 *
 * [rfc_5280]: https://tools.ietf.org/html/rfc5280
 */
@Suppress("UNCHECKED_CAST") // This needs to cast decoded collections.
internal object CertificateAdapters {
  /**
   * ```
   * Time ::= CHOICE {
   *   utcTime        UTCTime,
   *   generalTime    GeneralizedTime
   * }
   * ```

@Suppress("NOTHING_TO_INLINE")
internal inline fun <K, V> Map<K, V>.unmodifiable(): Map<K, V> = Collections.unmodifiableMap(this)

/** Returns an immutable copy of this. */
@Suppress("UNCHECKED_CAST")
internal fun <T> List<T>.toImmutableList(): List<T> =
  when {
    this.isEmpty() -> emptyList()

    this.size == 1 -> Collections.singletonList(this[0])

            alreadyEncoded = true,
            strict = true,
            unicodeAllowed = true,
          )
      }

    fun build(): HttpUrl {
      @Suppress("UNCHECKED_CAST") // percentDecode returns either List<String?> or List<String>.
      return HttpUrl(
        scheme = scheme ?: throw IllegalStateException("scheme == null"),
        username = encodedUsername.percentDecode(),