152   iterator insert(const_iterator position, const value_type& value) {  in insert()  argument
153     DCHECK(cbegin() <= position && position <= cend());  in insert()
154     return Base::insert(position, value);  in insert()
156   iterator insert(const_iterator position, size_type n, const value_type& value) {  in insert()  argument
157     DCHECK(cbegin() <= position && position <= cend());  in insert()
158     return Base::insert(position, n, value);  in insert()
161   iterator insert(const_iterator position, InputIterator first, InputIterator last) {  in insert()  argument
162     DCHECK(cbegin() <= position && position <= cend());  in insert()
163     return Base::insert(position, first, last);  in insert()
165   iterator insert(const_iterator position, value_type&& value) {  in insert()  argument
166     DCHECK(cbegin() <= position && position <= cend());  in insert()
167     return Base::insert(position, std::move(value));  in insert()
169   iterator insert(const_iterator position, std::initializer_list<value_type> il) {  in insert()  argument
170     DCHECK(cbegin() <= position && position <= cend());  in insert()
171     return Base::insert(position, il);  in insert()
175   iterator erase(const_iterator position) {  in erase()  argument
176     DCHECK(cbegin() <= position && position < cend());  in erase()
177     return Base::erase(position);  in erase()
187   iterator emplace(const_iterator position, Args&&... args) {  in emplace()  argument
188     DCHECK(cbegin() <= position && position <= cend());  in emplace()
189     Base::emplace(position, std::forward(args...));  in emplace()