FastAdapter MVVM generic class

AbstractBindableItem.java

public abstract class AbstractBindableItem<Item extends AbstractBindableItem & IItem & IClickable, VH extends FastBindableViewHolder<Item, Binding>, VM extends AndroidViewModel, Binding extends ViewDataBinding> extends AbstractItem<Item, VH> {

    @NotNull
    private VM viewModel;

    public AbstractBindableItem(@NotNull VM viewModel) {
        super();
        this.viewModel = viewModel;
    }

    @NotNull
    public VM getViewModel() {
        return viewModel;
    }

    @Nullable
    public abstract Binding getBinding(@NotNull View itemView);

    public abstract void dataBind(@NotNull Binding binding);


}

ExempleFormItem.java

public class ExampleFormItem extends AbstractBindableItem<ExampleFormItem, FastBindableViewHolder<ExampleFormItem, LayoutItemExampleFormBinding>, ExampleFormViewModel, LayoutItemExampleFormBinding> {

    public ExampleFormItem(@NotNull ExampleFormViewModel viewModel) {
        super(viewModel);
    }

    @Nullable
    @Override
    public LayoutItemExampleFormBinding getBinding(@NotNull View itemView) {
        return DataBindingUtil.bind(itemView);
    }

    @Override
    public void dataBind(@NotNull LayoutItemExampleFormBinding binding) {
        binding.setViewModel(getViewModel());
    }

    @NonNull
    @Override
    public FastBindableViewHolder<ExampleFormItem, LayoutItemExampleFormBinding> getViewHolder(View v) {
        return new FastBindableViewHolder<>(v,this);
    }

    @Override
    public int getType() {
        return R.id.example_form_id;
    }

    @Override
    public int getLayoutRes() {
        return R.layout.layout_item_example_form;
    }
}

FastBindableViewHolder.java

public class FastBindableViewHolder<Item extends AbstractBindableItem & IItem & IClickable, Binding extends ViewDataBinding> extends FastAdapter.ViewHolder<Item> {

    @Nullable
    private Binding binding;

    public FastBindableViewHolder(@NotNull View itemView, @NotNull Item item) {
        super(itemView);
        binding = (Binding) item.getBinding(itemView);
    }

    @Override
    public void bindView(@NotNull Item item, @NotNull List<Object> payloads) {
        if (binding != null) {
            item.dataBind(binding);
            binding.executePendingBindings();
        }
    }

    @Override
    public void unbindView(@NotNull Item item) {
        if (binding != null) {
            binding.unbind();
        }
    }
}