CLASS net/minecraft/class_1306 net/minecraft/util/Arm
FIELD field_6181 optionName Lnet/minecraft/class_2561;
METHOD <init> (Ljava/lang/String;ILnet/minecraft/class_2561;)V
ARG 3 optionName
METHOD method_5928 getOpposite ()Lnet/minecraft/class_1306;