code: boolean renderItem(ItemStack itemStack)
  	{
  		if (itemStack.isEmpty())
  			return false;
  
  		IItemRenderer renderer = getItemRendererOverride(itemStack);
  		if (renderer == null)
  			renderer = itemRenderers.get(itemStack.getItem());
  		if (renderer == null)
  			return false;
  
  		renderer.renderItem(itemStack, MalisisRenderer.getPartialTick());
  		return true;
  	}
docs: Renders the {@link ItemStack} with a registered {@link IItemRenderer}.
  
  @param itemStack the item stack
  @return true, if successful