writeBytesTotal += toWrite.toLong()
      }

      byteCount -= toWrite.toLong()
      writer.data(outFinished && byteCount == 0L, streamId, buffer, toWrite)
    }
  }

  internal fun writeSynResetLater(
    streamId: Int,
    errorCode: ErrorCode,
  ) {
    writerQueue.execute("$connectionName[$streamId] writeSynReset") {
      try {
        writeSynReset(streamId, errorCode)

   */
  fun closeLater(errorCode: ErrorCode) {
    if (!closeInternal(errorCode, null)) {
      return // Already closed.
    }
    connection.writeSynResetLater(id, errorCode)
  }

  /** Returns true if this stream was closed. */
  private fun closeInternal(
    errorCode: ErrorCode,
    errorException: IOException?,
  ): Boolean {
    lock.assertNotHeld()