combinedListingUpdate
Add, remove and update `CombinedListing`s of a given Product.
`CombinedListing`s are comprised of multiple products to create a single listing. There are two kinds of products used in a `CombinedListing`:
1. Parent products
2. Child products
The parent product is created with a `productCreate` with a `CombinedListingRole` of `PARENT`. Once created, you can associate child products with the parent product using this mutation. Parent products represent the idea of a product (e.g. Shoe).
Child products represent a particular option value (or combination of option values) of a parent product. For instance, with your Shoe parent product, you may have several child products representing specific colors of the shoe (e.g. Shoe - Blue). You could also have child products representing more than a single option (e.g. Shoe - Blue/Canvas, Shoe - Blue/Leather, etc...).
The combined listing is the association of parent product to one or more child products.
Learn more about [Combined Listings](https://shopify.dev/apps/selling-strategies/combined-listings).