src/game/java/net/minecraft/advancements/AdvancementHolder.java

package net.minecraft.advancements;

import java.util.List;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.resources.ResourceLocation;

public record AdvancementHolder(ResourceLocation id, Advancement value) {
    public static final StreamCodec<RegistryFriendlyByteBuf, AdvancementHolder> STREAM_CODEC = StreamCodec.composite(
        ResourceLocation.STREAM_CODEC, AdvancementHolder::id, Advancement.STREAM_CODEC, AdvancementHolder::value, AdvancementHolder::new
    );
    public static final StreamCodec<RegistryFriendlyByteBuf, List<AdvancementHolder>> LIST_STREAM_CODEC = STREAM_CODEC.apply(ByteBufCodecs.list());

    @Override
    public boolean equals(Object p_298719_) {
        if (this == p_298719_) {
            return true;
        } else {
            if (p_298719_ instanceof AdvancementHolder advancementholder && this.id.equals(advancementholder.id)) {
                return true;
            }

            return false;
        }
    }

    @Override
    public int hashCode() {
        return this.id.hashCode();
    }

    @Override
    public String toString() {
        return this.id.toString();
    }
}