std::basic_osyncstream<CharT,Traits,Allocator>::rdbuf
From cppreference.com
                    
                                        
                    < cpp | io | basic osyncstream
                    
                                                            
                    |   syncbuf_type* rdbuf() const noexcept;  | 
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Returns a pointer to the underlying std::basic_syncbuf.
Parameters
(none)
Example
| This section is incomplete Reason: no example  | 
See also
|    obtains a pointer to the final destination stream buffer  (public member function)  |