Trigger for building privilege zone

Docs say:

void OnEntityEnter(TriggerBase trigger, BaseEntity entity)
{
Puts("OnEntityEnter works!");
}

Called when an entity enters a trigger (building privilege zone, water area, radiation zone, hurt zone, etc.)

I can't find the trigger for the building privilege zone. Only TriggerSafeZone, TriggerHurt etc.

Any idea?

 

was removed from game.