CustomCollection Functions
getCustomCollections(...)getCustomCollectionsCount(...)
getCustomCollection(customCollectionId, ...)
createCustomCollection(customCollection, ...)
modifyCustomCollection(customCollection, ...)
deleteCustomCollection(customCollectionId, ...)
additional request parameters
a CustomCollection id number
a list containing CustomCollection fields
a list containing a CustomCollection fields or a list of CustomCollections
Shopify API CustomCollection documentation: https://help.shopify.com/api/reference/products/customcollection