CLASS net/minecraft/class_9374 net/minecraft/loot/function/SetBookCoverLootFunction
	FIELD field_49870 CODEC Lcom/mojang/serialization/MapCodec;
	FIELD field_49871 author Ljava/util/Optional;
	FIELD field_49872 title Ljava/util/Optional;
	FIELD field_49873 generation Ljava/util/Optional;
	METHOD <init> (Ljava/util/List;Ljava/util/Optional;Ljava/util/Optional;Ljava/util/Optional;)V
		ARG 1 conditions
		ARG 2 title
		ARG 3 author
		ARG 4 generation
	METHOD method_58200 apply (Lnet/minecraft/class_9302;)Lnet/minecraft/class_9302;
		ARG 1 current
	METHOD method_58201 (Lnet/minecraft/class_9374;)Ljava/util/Optional;
		ARG 0 function
	METHOD method_58202 (Lcom/mojang/serialization/codecs/RecordCodecBuilder$Instance;)Lcom/mojang/datafixers/kinds/App;
		ARG 0 instance
	METHOD method_58203 (Lnet/minecraft/class_9374;)Ljava/util/Optional;
		ARG 0 function
	METHOD method_58204 (Lnet/minecraft/class_9374;)Ljava/util/Optional;
		ARG 0 function