key_compare key_comp() const;

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

size_type size() const;

reference at( size_type pos );

T* data();

local_iterator end( size_type n );

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

float load_factor() const;

void merge( list& other ); (1)

void push_back( const T& value ); (1)