The hash identifier for the item in question. Use it to look up the item's DestinyInventoryItemDefinition.
Mapped to DestinyInventoryItemDefinition in the manifest.
If this quantity is referring to a specific instance of an item, this will have the item's instance ID. Normally, this will be null.
The amount of the item needed/available depending on the context of where DestinyItemQuantity is being used.
Used in a number of Destiny contracts to return data about an item stack and its quantity. Can optionally return an itemInstanceId if the item is instanced - in which case, the quantity returned will be 1. If it's not... uh, let me know okay? Thanks.