ReadonlyactionReadonlycategoryThe Category to add.
Optional ReadonlyorderA string representing a number between 0 and 1. Must start with 0. and cannot end with 0. If empty, any existing value will be removed.
Optional ReadonlystagedIf true, only the staged categories and categoryOrderHints are updated. If false, both the current and staged categories and categoryOrderHints are updated.
Produces the ProductAddedToCategory Message.