code: public UIImage setItemStack(ItemStack itemStack)
  	{
  		this.icon = null;
  		this.itemStack = itemStack;
  		setSize(ITEMSTACK_SIZE);
  		setForeground(IS_RENDER);
  		return this;
  	}
docs: Sets the {@link ItemStack} to render.
  
  @param itemStack the item stack
  @return this UIImage