- const auto begin() const { return this->children_.begin(); }
- const auto end() const { return this->children_.end(); }
- const auto rbegin() const { return this->children_.rbegin(); }
- const auto rend() const { return this->children_.rend(); }
+ auto begin() const { return this->children_.begin(); }
+ auto end() const { return this->children_.end(); }
+ auto rbegin() const { return this->children_.rbegin(); }
+ auto rend() const { return this->children_.rend(); }