public ItemStack onItemRightClick(ItemStack is, World world, EntityPlayer player) {
if (world.isRemote) {
Minecraft.getMinecraft().thePlayer.displayGuiScreen(new GuiCrafting(player.inventory, world, (int)player.posX, (int)player.posY, (int)player.posZ)));
}
if (!world.isRemote) {
player.openContainer = new ContainerWorkbench(player.inventory, world, (int)player.posX, (int)player.posY, (int)player.posZ));
}
return super.onItemRightClick(is, world, player);
}