code: public void insert(final int index, @NonNull final T... items) {
          Pair<Integer, T>[] pairs = new Pair[items.length];
          for (int i = 0; i < items.length; i++) {
              pairs[i] = new Pair<>(index + i, items[i]);
          }
          insert(pairs);
      }
docs: Inserts items, starting at given index. Will show an entrance animation for the new items if the newly added items are visible.
  Will also call {@link Insertable#add(int, Object)} of the root {@link android.widget.BaseAdapter}.
  
  @param index the starting index the new items should be inserted at.
  @param items the items to insert.