docs: public OnItemBindClass<T> map(@NonNull Class<? extends T> itemClass, final int variableId, @LayoutRes final int layoutRes) {
          int index = itemBindingClassList.indexOf(itemClass);
          if (index >= 0) {
              itemBindingList.set(index, itemBind(variableId, layoutRes));
          } else {
              itemBindingClassList.add(itemClass);
              itemBindingList.add(itemBind(variableId, layoutRes));
          }
          return this;
      }