16                   struct ordered_map : std::vector<std::pair<const Key, T>, Allocator>  struct
18     using key_type = Key;
19     using mapped_type = T;
20     using Container = std::vector<std::pair<const Key, T>, Allocator>;
28     ordered_map(const Allocator& alloc = Allocator()) : Container{alloc} {}  in ordered_map()  argument
30     ordered_map(It first, It last, const Allocator& alloc = Allocator())  in ordered_map()  argument
32     ordered_map(std::initializer_list<T> init, const Allocator& alloc = Allocator() )  in ordered_map()  function
35     std::pair<iterator, bool> emplace(const key_type& key, T&& t)  in emplace()
48     T& operator[](const Key& key)  in operator []()
53     const T& operator[](const Key& key) const  in operator []()
58     T& at(const Key& key)  in at()
71     const T& at(const Key& key) const  in at()
84     size_type erase(const Key& key)  in erase()
103     iterator erase(iterator pos)  in erase()
117     size_type count(const Key& key) const  in count()
129     iterator find(const Key& key)  in find()
141     const_iterator find(const Key& key) const  in find()
153     std::pair<iterator, bool> insert( value_type&& value )  in insert()
158     std::pair<iterator, bool> insert( const value_type& value )  in insert()