docs: private void DrawPrimitive( DrawItem i, World w ) throws Exception
      {
          ItemStack item = MinecraftTypeHelper.getItemStackFromDrawItem(i);
          if (item == null)
              throw new Exception("Unrecognised item type: "+i.getType());
          BlockPos pos = new BlockPos( i.getX(), i.getY(), i.getZ() );
          placeItem(item, pos, w, true);
      }