std::basic_string<CharT,Traits,Allocator>::get_allocator
From cppreference.com
                    
                                        
                    < cpp | string | basic string
                    
                                                            
                    |   allocator_type get_allocator() const;  | 
(until C++20) | |
|   constexpr allocator_type get_allocator() const noexcept;  | 
(since C++20) | |
Returns the allocator associated with the string.
Parameters
(none)
Return value
The associated allocator.
Complexity
Constant.
See also
|    the default allocator   (class template)  | |
|    (C++11)  | 
   provides information about allocator types   (class template)  | 
|    (C++11)  | 
   checks if the specified type supports uses-allocator construction   (class template)  |