} else if (cmp > 0) {
        return (right == null) ? 0 : right.count(comparator, e);
      } else {
        return elemCount;
      }
    }

    @CanIgnoreReturnValue
    private AvlNode<E> addRightChild(@ParametricNullness E e, int count) {
      right = new AvlNode<>(e, count);
      successor(this, right, succ());
      height = max(2, height);
      distinctElements++;
      totalCount += count;