Deferred NeoForge

Mod.java

@Mod(Mod.MODID)
public class Mod {
    public static final String MODID = "mod";
  
    public Mod(IEventBus modEventBus, ModContainer modContainer) {
        ModItems.ITEMS.register(modEventBus);
    }
}

ModItems.java

public class ModItems {
    public static final DeferredRegister.Items ITEMS = DeferredRegister.createItems(MODID);

    public static final DeferredItem<Item> ITEM_A = ITEMS.registerItem("item_a", Item::new);
    public static final DeferredItem<Item> ITEM_B = ITEMS.registerItem("item_b", Item::new);
}