public class ExampleMod implements ModInitializer {
  public static final Block EXAMPLE_BLOCK = register("example_block", Block::new, Block.Settings.create().strength(4.0f));

  private static Block register(String path, Function<AbstractBlock.Settings, Block> factory, AbstractBlock.Settings settings) {
    final Identifier identifier = Identifier.of("tutorial", path);
    final RegistryKey<Block> registryKey = RegistryKey.of(RegistryKeys.BLOCK, identifier);

    final Block block = Blocks.register(registryKey, factory, settings);
    Items.register(block);
    return block;
  }
}