This event is fired immediately after a potion has been "brewed" by the brewing stand tile entity, when the output items have already been replaced. If the PotionBrewPreEvent has been cancelled but the itemstacks within the brewing stand have been modified, this event will also be fired.

If the pre-event is cancelled without modifying itemstacks, this event will not be fired.

You will need to cast the event in the function header as this class:
crafttweaker.event.PotionBrewPostEvent You can, of course, also import the class before and use that name then.

PotionBrewPost Events implement the following interfaces and are able to call all of their methods/getters/setters as well:

• IPotionBrewEvent