package gr8pefish.ironbackpacks.achievements; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.inventory.IInventory; import net.minecraft.item.ItemStack; import net.minecraft.stats.Achievement; //cred to Vazkii for the base code public interface IBackpackCraftAchievement { public Achievement getAchievementOnCraft(ItemStack stack, EntityPlayer player, IInventory matrix); }