https://www.ltx.cz/modules/packetery/views/js/checkout-modules/unknown.js?v=2.1.19

1// naming convention: PacketerCheckoutModule + moduleId (first letter in upper case)
2
3// this unknown module support already existed in front.js
4var PacketeryCheckoutModuleUnknown = {
5
6    getSelectedInput: function () {
7        return $('.delivery_option.selected input');
8    },
9
10    findDeliveryOptions: function () {
11        return $('.delivery_option input');
12    },
13
14    enableSubmitButton: function () {
15        $('button[name="confirmDeliveryOption"]')
16            .removeClass('disabled')
17            .css("pointer-events", "auto");
18    },
19
20    disableSubmitButton: function () {
21        $('button[name="confirmDeliveryOption"]')
22            .addClass('disabled')
23            .css("pointer-events", "none");
24    },
25
26    hideValidationErrors: function () {},
27
28    getExtraContentSelector: function () {
29        return '.carrier-extra-content';
30    }
31};