62   explicit dchecked_vector(size_type n, const allocator_type& alloc = allocator_type())
63       : Base(n, alloc) { }  in Base()  argument
64   dchecked_vector(size_type n,
67       : Base(n, value, alloc) { }  in Base()  argument
122   reference operator[](size_type n) {
123     DCHECK_LT(n, size());
124     return Base::operator[](n);
126   const_reference operator[](size_type n) const {
127     DCHECK_LT(n, size());
128     return Base::operator[](n);
154   iterator insert(const_iterator position, size_type n, const value_type& value) {  in insert()  argument
156     return Base::insert(position, n, value);  in insert()