void pop_front();

void swap( unordered_multimap& other );

template< class T, class Container, class Compare,class Alloc >

size_type bucket( const Key& key ) const;

template< class... Args > std::pair<iterator,bool> emplace(

void clear();

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

size_type max_size() const;

reference front();

(1)