code = statusLine.code
        message = statusLine.message
        val responseHeadersBuilder = Headers.Builder()
        val responseHeaderLineCount = readInt(source)
        for (i in 0 until responseHeaderLineCount) {
          responseHeadersBuilder.addLenient(source.readUtf8LineStrict())
        }
        val sendRequestMillisString = responseHeadersBuilder[SENT_MILLIS]