Unity In-App Purchasing - Reset

Hey, is there currently a way to reinitialize/reset the Unity IAP once Initialize was already called?
This is for a case where I need to change the items I added at first

@davidb1 Adding items is possible with Unity 5.4’s FetchAdditionalProducts

Deleting items is not possible, currently.

Would you mind sharing a description of the use-case for, if this is what is desired, deleting items from the IAP layer?