Get all product categories
- Retrieves a list of product categories for a destination that can be used as a means of filtering when searching for products using the service
- This service can be used to get a list of all categories and subcategories for a destination by including its
destId, or you can omit thedestIdto get a list of all categories and subcategories - Note: If no
destIdis passed,productCountandthumbnailURLwill benullas they are destination-specific fields