The ItemExpire Event is fired whenever an Item expires (reaches its macimum lifespan).
It can be canceled to prevent the item from being flagged as dead.
If canceled it will add extralife to the item's lifetime.

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

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

• IEntityEvent
• IEventCancelable

ZenGetter	ZenSetter	类型
ZenGetter item	ZenSetter ​	类型 IEntityItem
ZenGetter extraLife	ZenSetter extraLife	类型 int