package com.minelittlepony.unicopia.item; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NbtCompound; public interface GlowableItem { default boolean isGlowing(ItemStack stack) { NbtCompound tag = stack.getSubTag("display"); return tag != null && tag.getBoolean("glowing"); } default void setGlowing(ItemStack stack, boolean glowing) { stack.getOrCreateSubTag("display").putBoolean("glowing", glowing); } }