for(Item item: ItemHandler.INSTANCE.itemList){
            ClientProxy.MINECRAFT.getRenderItem().getItemModelMesher().register(item, new ItemMeshDefinition() {
                @Override
                public ModelResourceLocation getModelLocation(ItemStack stack) {
                    //if the method doesn't work
                    //return new ModelResourceLocation(Test.MODID + ":" + item.getUnlocalizedName().substring(5), "inventory");
                    //return new ModelResourceLocation(Test.MODID + ":" + item.getRegistryName().getResourcePath(), "inventory");
                    return new ModelResourceLocation(item.getRegistryName(), "inventory");
                }
            });
        }