flags = FLAG_NONE,
      )
      for (i in 0 until Settings.COUNT) {
        if (!settings.isSet(i)) continue
        val id =
          when (i) {
            4 -> 3 // SETTINGS_MAX_CONCURRENT_STREAMS renumbered.
            7 -> 4 // SETTINGS_INITIAL_WINDOW_SIZE renumbered.
            else -> i
          }
        sink.writeShort(id)
        sink.writeInt(settings[i])
      }
      sink.flush()

        2 -> {
          if (value != 0 && value != 1) {
            throw IOException("PROTOCOL_ERROR SETTINGS_ENABLE_PUSH != 0 or 1")
          }
        }

        // SETTINGS_MAX_CONCURRENT_STREAMS
        3 -> id = 4 // Renumbered in draft 10.

        // SETTINGS_INITIAL_WINDOW_SIZE
        4 -> {
          id = 7 // Renumbered in draft 10.
          if (value < 0) {