template< class T, class Alloc > void swap(

iterator insert( const value_type& value ); (1)

local_iterator begin( size_type n );

size_type size() const;

(1)

local_iterator begin( size_type n );

template< class Key, class Compare, class Alloc

bool empty() const;

bool empty() const;

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