std::multiset::value_compare value_comp() const;

(1)

template <class... Args> pair<iterator, bool> try_emplace(const

bool empty() const;

template <class... Args> iterator emplace_hint( const_iterator

reverse_iterator rbegin();

iterator end();

void reserve( size_type count );

reverse_iterator rend();

iterator lower_bound( const Key& key ); (1)