public class ItemSmallBackPack extends Item{
    public ItemSmallBackPack(String unlocalizedName, String registryName)
    {
        super();
        this.setUnlocalizedName(unlocalizedName);
        this.setRegistryName(registryName);
        this.setMaxStackSize(1);
        setCreativeTab(WalkingDeadMod.WalkingDead);
    }


    @Override
    public int getMaxItemUseDuration(ItemStack stack) {
        return 1;
    }

    @Override
    public ActionResult<ItemStack> onItemRightClick(World worldIn, EntityPlayer player, EnumHand handIn) {
        if (!worldIn.isRemote)
        {
            // If player not sneaking, open the inventory gui
            if (!player.isSneaking()) {
                player.openGui(WalkingDeadMod.instance, WalkingDeadMod.GUI_ITEM_INV, worldIn, 0, 0, 0);
            }
                    }
        return null;
    }
}