}
      return result;
    }

    @Override
    public BaseEncoding ignoreCase() {
      BaseEncoding result = ignoreCase;
      if (result == null) {
        Alphabet ignore = alphabet.ignoreCase();
        result = ignoreCase = (ignore == alphabet) ? this : newInstance(ignore, paddingChar);
      }
      return result;
    }

internal fun Headers.commonValues(name: String): List<String> {
  var result: MutableList<String>? = null
  for (i in 0 until size) {
    if (name.equals(name(i), ignoreCase = true)) {
      if (result == null) result = ArrayList(2)
      result.add(value(i))
    }
  }
  return result?.unmodifiable().orEmpty()
}

        return emptyList()
      }

    var cookies: MutableList<Cookie>? = null
    for ((key, value) in cookieHeaders) {
      if (("Cookie".equals(key, ignoreCase = true) || "Cookie2".equals(key, ignoreCase = true)) &&
        value.isNotEmpty()
      ) {
        for (header in value) {
          if (cookies == null) cookies = mutableListOf()

     */
    private fun Headers.varyFields(): Set<String> {
      var result: MutableSet<String>? = null
      for (i in 0 until size) {
        if (!"Vary".equals(name(i), ignoreCase = true)) {
          continue
        }

        val value = value(i)
        if (result == null) {
          result = TreeSet(String.CASE_INSENSITIVE_ORDER)
        }

      .assertCode(200)
      .assertBody("success!")

    assertThat(proxySelector.failures)
      .all {
        hasSize(1)
        index(0).matches(".* Connect timed out".toRegex(RegexOption.IGNORE_CASE))
      }
  }

  /** https://github.com/square/okhttp/issues/4875  */
  @Test
  fun interceptorRecoversWhenRoutesExhausted() {