Mostly replacing instanceof check and cast with e.g. 'instanceof Player
player'
Replaced some "switch" statements by "if" statements to increase
readability.
Used the primitive boolean check to avoid potential NPEs.
Reordered field modifiers to comply with the Java Language
Specification. Mainly @NonNull position.
* more abstract on delete chunks
* update NMS to 1.18.2
* at most abstract, requires only the island and the world
* it's weird that we can't use whenComplete
* rename to WorldRegenerator
tastybento
tastybento
Huynh Tien