Wrong function on network adapter close?

[cheesy304]

First of all, I am just a hobby programmer :)

So basically this is my function.
I have an order which has many order_pos. From the order_pos i can get the corresponding printer (different item different printer)
For your information, i am generating an image which is printed. So i dont have to worry about encoding (like my names show) can print all fonts I want and all sizes I want.
But this is just a side note.

static async printOrder(order: Order) {
    PrintingService.splitOrderToPrintRequest(order).then(pr => {
      for (let printerInfo of pr) {
        (new Network(printerInfo.printerAddress)).open((x, device) => {
          PrintingService.getOrderFromIDAndPrinters(order.id, printerInfo.id).then(realOrder => {
            if (!realOrder) {
              throw new Error("Order is null")
            }
            try {
              // @ts-ignore
              const printer = new Printer(device, { encoding: "cp437" })
              printer.image(new fickEncodings(realOrder, false).toImage()).then(p => {
                p.cut;
                p.close()
            })
            }
            catch (err) {
              console.log(err)
            }
          })

        })
      }
    })
  }

You can see i am using the inteded way in the function. But i get following error.

node_modules\@node-escpos\core\dist\index.cjs:1167
    return new Promise((resolve, reject) => {
           ^
TypeError: this.adapter.close is not a function

with a console.log(p) in runtime I did see that THE ADAPTER has no close() instead there is an end()
So I tried changing this part

  async close(...closeArgs) {
    await this.flush();
    return new Promise((resolve, reject) => {
      this.adapter.close((error) => {
        if (error)
          reject(error);
        resolve(this);
      }, ...closeArgs);
    });
  }

to this:

  async close(...closeArgs) {
    await this.flush();
    return new Promise((resolve, reject) => {
      this.adapter.end((error) => {
        if (error)
          reject(error);
        resolve(this);
      }, ...closeArgs);
    });
  }

So i dont know if this is happening to any of you. But with this change its working for me.
plus: i dont have any problems with Too much requests, the printjobs will just wait and print after each other. Magic..