networkHeaders[fieldName] == null
        ) {
          result.addLenient(fieldName, value)
        }
      }

      for (index in 0 until networkHeaders.size) {
        val fieldName = networkHeaders.name(index)
        if (!isContentSpecificHeader(fieldName) && isEndToEnd(fieldName)) {
          result.addLenient(fieldName, networkHeaders.value(index))
        }
      }

        if (name == RESPONSE_STATUS_UTF8) {
          statusLine = StatusLine.parse("HTTP/1.1 $value")
        } else if (name !in HTTP_2_SKIPPED_RESPONSE_HEADERS) {
          headersBuilder.addLenient(name, value)
        }
      }
      if (statusLine == null) throw ProtocolException("Expected ':status' header not present")

      return Response
        .Builder()
        .protocol(protocol)

        val varyHeadersBuilder = Headers.Builder()
        val varyRequestHeaderLineCount = readInt(source)
        for (i in 0 until varyRequestHeaderLineCount) {
          varyHeadersBuilder.addLenient(source.readUtf8LineStrict())
        }
        varyHeaders = varyHeadersBuilder.build()

        val statusLine = StatusLine.parse(source.readUtf8LineStrict())
        protocol = statusLine.protocol

  return millis.toInt()
}

internal fun List<Header>.toHeaders(): Headers {
  val builder = Headers.Builder()
  for ((name, value) in this) {
    builder.addLenient(name.utf8(), value.utf8())
  }
  return builder.build()
}

internal fun Headers.toHeaderList(): List<Header> =
  (0 until size).map {
    Header(name(it), value(it))
  }