150   iterator insert(const_iterator position, const value_type& value) {  in insert()  argument
151     DCHECK(cbegin() <= position && position <= cend());  in insert()
152     return Base::insert(position, value);  in insert()
154   iterator insert(const_iterator position, size_type n, const value_type& value) {  in insert()  argument
155     DCHECK(cbegin() <= position && position <= cend());  in insert()
156     return Base::insert(position, n, value);  in insert()
159   iterator insert(const_iterator position, InputIterator first, InputIterator last) {  in insert()  argument
160     DCHECK(cbegin() <= position && position <= cend());  in insert()
161     return Base::insert(position, first, last);  in insert()
163   iterator insert(const_iterator position, value_type&& value) {  in insert()  argument
164     DCHECK(cbegin() <= position && position <= cend());  in insert()
165     return Base::insert(position, std::move(value));  in insert()
167   iterator insert(const_iterator position, std::initializer_list<value_type> il) {  in insert()  argument
168     DCHECK(cbegin() <= position && position <= cend());  in insert()
169     return Base::insert(position, il);  in insert()
173   iterator erase(const_iterator position) {  in erase()  argument
174     DCHECK(cbegin() <= position && position < cend());  in erase()
175     return Base::erase(position);  in erase()
185   iterator emplace(const_iterator position, Args&&... args) {  in emplace()  argument
186     DCHECK(cbegin() <= position && position <= cend());  in emplace()
187     Base::emplace(position, std::forward(args...));  in emplace()