@Override
  public void generateBlockStateModels(BlockStateModelGenerator blockStateModelGenerator) {
    // ...
    
    final Identifier verticalSlabModelId = VERTICAL_SLAB.upload(TutorialBlocks.POLISHED_ANDESITE_VERTICAL_SLAB, TextureMap.all(Identifier.ofVanilla("block/polished_andesite")), blockStateModelGenerator.modelCollector);
    blockStateModelGenerator.registerParentedItemModel(TutorialBlocks.POLISHED_ANDESITE_VERTICAL_SLAB, verticalSlabModelId);
  }