Get Product Sort Order

Returns a list of products and their sort order for a specific category. **Usage Notes** * Data pairs are displayed in ascending order based on products' `sort_order` values. * `null` values are allowed for products without specified `sort_order` values. * Products with `sort_order` value of `null` will be displayed after products with valid numerical values. * The priorities for determining product sort order on a storefront are the following: - Priority 1: Manually specified sort order o...