odoo.define('test_payment.test_checkout_form',  require => {    'use strict';
    const PaymentCheckoutForm = require('payment.checkout_form');
    const paymentFormMixin = require('payment.payment_form_mixin');
    const manageForm = require('payment.manage_form');
    const publicWidget = require('web.public.widget');

    const test_Mixin = {        

​ ​_prepareInlineForm: function (code, paypaymentOptionId, flow){  

          ​ ​if(code != "test"){

                ​ ​ ​ return this._super(...arguments);

​                   }            

​ ​ ​console.log("abcdefghijklmop")        

​}    

​}    

PaymentCheckoutForm.include(test_Mixin);    

manageForm.include(test_Mixin);});

I want to try to replicate the payment_form.js of the payment_adyen to understand the usage of _prepareInlineForm, but i get this error, i don't understand what i am missing. I am working with Odoo 16. Thanks in advance for the time you will take for my answer.