docs: @NonNull
      public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
          AdapterDelegate<T> delegate = getDelegateForViewType(viewType);
          if (delegate == null) {
              throw new NullPointerException("No AdapterDelegate added for ViewType " + viewType);
          }
  
          RecyclerView.ViewHolder vh = delegate.onCreateViewHolder(parent);
          if (vh == null) {
              throw new NullPointerException("ViewHolder returned from AdapterDelegate "
                      + delegate
                      + " for ViewType ="
                      + viewType
                      + " is null!");
          }
          return vh;
      }