Method getSubItems

src/main/java/net/minecraft/item/ItemPotion.java:344–399

returns a list of items with the same ID, but different meta (eg: dye returns 16 items) @param subItems The List of sub-items. This is a List of ItemStacks.

(Item itemIn, CreativeTabs tab, List<ItemStack> subItems)

     * @param subItems The List of sub-items. This is a List of ItemStacks.
     */
    public void getSubItems(Item itemIn, CreativeTabs tab, List<ItemStack> subItems)
    {
        super.getSubItems(itemIn, tab, subItems);

        if (SUB_ITEMS_CACHE.isEmpty())
        {
            for (int i = 0; i <= 15; ++i)
            {
                for (int j = 0; j <= 1; ++j)
                {
                    int lvt_6_1_;

                    if (j == 0)
                    {
                        lvt_6_1_ = i | 8192;
                    }
                    else
                    {
                        lvt_6_1_ = i | 16384;
                    }

                    for (int l = 0; l <= 2; ++l)
                    {
                        int i1 = lvt_6_1_;

                        if (l != 0)
                        {
                            if (l == 1)
                            {
                                i1 = lvt_6_1_ | 32;
                            }
                            else if (l == 2)
                            {
                                i1 = lvt_6_1_ | 64;
                            }
                        }

                        List<PotionEffect> list = PotionHelper.getPotionEffects(i1, false);

                        if (list != null && !list.isEmpty())
                        {
                            SUB_ITEMS_CACHE.put(list, i1);
                        }
                    }
                }
            }
        }

        Iterator iterator = SUB_ITEMS_CACHE.values().iterator();

        while (iterator.hasNext())
        {
            int j1 = ((Integer)iterator.next());
            subItems.add(new ItemStack(itemIn, 1, j1));
        }
    }
}