if (byteCount == 0L) {
      writer.data(outFinished, streamId, buffer, 0)
      return
    }

    var byteCount = byteCount
    while (byteCount > 0L) {
      var toWrite: Int
      this.withLock {
        try {
          while (writeBytesTotal >= writeBytesMaximum) {
            // Before blocking, confirm that the stream we're writing is still open. It's possible