The PlayerInteractEntity Event is fired whenever a player interacts with an Entity. It can be canceled to prevent the interaction from taking place. If the event is canceled, a specific result of success, fail or pass can be provided. By default, the result is pass.

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

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

• IEventCancelable
• PlayerInteract
• IPlayerEvent

The following information can be retrieved from the event:

ZenGetter	ZenSetters	Return Type
ZenGetter player	ZenSetters ​	Return Type IPlayer
ZenGetter target	ZenSetters ​	Return Type IEntity
ZenGetter cancellationResult	ZenSetters cancellationResult	Return Type string ("success" / "pass" / "fail")

• event.cancel() sets the event as cancelled.