Method hasTagCompound

src/main/java/net/minecraft/item/ItemStack.java:532–535

Returns true if the ItemStack has an NBTTagCompound. Currently used to store enchantments.

()

     * Returns true if the ItemStack has an NBTTagCompound. Currently used to store enchantments.
     */
    public boolean hasTagCompound()
    {
        return this.stackTagCompound != null;
    }

    /**
     * Returns the NBTTagCompound of the ItemStack.