The WorldTick Event is fired each tick for each world on both client and server.

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

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

• ITickEvent

The following additional information can be retrieved from the event:

ZenGetter	Return Type
ZenGetter world	Return Type IWorld