src/game/java/net/minecraft/client/model/ArmedModel.java

package net.minecraft.client.model;

import com.mojang.blaze3d.vertex.PoseStack;
import net.minecraft.world.entity.HumanoidArm;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public interface ArmedModel {
    void translateToHand(HumanoidArm p_102108_, PoseStack p_102109_);
}