@Mod.EventHandler
  public void preInit(FMLPreInitializationEvent evt) {
    // load config
    config = new ConfigHandler(evt.getSuggestedConfigurationFile());
    config.load(true);
    // init networking

    // init keybindings

    // registerItems items
    ModItems.registerItems();
    // registerBlocks blocks
    ModBlocks.registerBlocks();
  }