WaterUnderground

The same than Wander, but the entity immediately starts digging underground before actually wandering.

Frequency meaning

The same than Wander.

SetUp (Only if it's the default behavior)

There is no logic here unlike Wander meaning the NPCControl starts with an expired actioncooldown and will try to wander on the first admissible DoBehavior cycle.

SetInitialBehavior (Only if it's the default behavior)

Calls InstantDig on the entity which immediately causes it to dig underground.

DoBehavior

The entity.digging is set to true while the behaviorroutine isn't in progress. It is set to false otherwise. This makes sure the NPCControl is digging even if behavior switches have happened unless there is bheaviorroutine in progress.

After, the same logic than Wander follows.