have getSlotData function in the OnFill Function

[howlowck]

Is your feature request related to a problem? Please describe. There will be situations where one onFill function requires knowledge of another slotData

Describe the solution you'd like getSlotData that returns the entity payload of other slots giving the SlotId

Describe alternatives you've considered The only way to get other slots right now is in the onComplete function

Additional context