streamId: Int,
    errorCode: ErrorCode,
  ) {
    writerQueue.execute("$connectionName[$streamId] writeSynReset") {
      try {
        writeSynReset(streamId, errorCode)
      } catch (e: IOException) {
        failConnection(e)
      }
    }
  }

  @Throws(IOException::class)
  internal fun writeSynReset(
    streamId: Int,
    statusCode: ErrorCode,
  ) {
    writer.rstStream(streamId, statusCode)

  fun close(
    rstStatusCode: ErrorCode,
    errorException: IOException?,
  ) {
    if (!closeInternal(rstStatusCode, errorException)) {
      return // Already closed.
    }
    connection.writeSynReset(id, rstStatusCode)
  }

  override fun cancel() {
    closeLater(ErrorCode.CANCEL)
  }

  /**
   * Abnormally terminate this stream. This enqueues a `RST_STREAM` frame and returns immediately.