The PortalSpawn Event is fired when an attempt is made to spawn a nether portal. If cancelled, the portal will not be spawned.

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

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

• IEventCancelable
• IBlockEvent

ZenGetter	类型	描述
ZenGetter valid	类型 bool	描述 If the size of portal is valid
ZenGetter height #实体高度	类型 int	描述 The height of portal
ZenGetter width #宽度	类型 int	描述 The width of portal