The PlayerSetSpawn Event is fired whenever a player's spawn location changes.
It can be canceled to prevent further processing.

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

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

• IPlayerEvent
• IEventCancelable

The following information can be retrieved from the event:

ZenGetter	Return Type
ZenGetter player	Return Type IPlayer
ZenGetter isForced	Return Type bool
ZenGetter newSpawn	Return Type IBlockPos