This component allows enabling return product and linking it to this product.
Value for this component can be set via
long type). The return product ID must be pointing to another Bókun product. This parameter is optional and can be both set and retrieved by the API client.
Clients must be sending
null in order to erase previously set value and make this product a usual (non-return) product.
Note: there are special requirements for the return product which are listed outside of this documentation.