CLASS bwg net/minecraft/world/chunk/UpgradeData
FIELD a NO_UPGRADE_DATA Lbwg;
FIELD b LOGGER Lorg/apache/logging/log4j/Logger;
FIELD d sides Ljava/util/EnumSet;
FIELD e indices [[I
METHOD <init> (Lia;)V
ARG 1 tag
METHOD b toTag ()Lia;