sink.writeInt(lastGoodStreamId)
      sink.writeInt(errorCode.httpCode)
      if (debugData.isNotEmpty()) {
        sink.write(debugData)
      }
      sink.flush()
    }
  }

  /**
   * Inform peer that an additional `windowSizeIncrement` bytes can be sent on `streamId`, or the
   * connection if `streamId` is zero.
   */
  @Throws(IOException::class)
  fun windowUpdate(
    streamId: Int,