The EntityLivingJump Event is fired whenver an entity jumps.

You will need to cast the event in the function header as this class:
crafttweaker.event.EntityLivingJumpEvent
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:

• ILivingEvent