std::move_only_function::swap
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                    < cpp | utility | functional | move only function
                    
                                                            
                    |   void swap( move_only_function& other ) noexcept;  | 
(since C++23) | |
Exchanges the stored callable objects of *this and other.
Parameters
| other | - | function wrapper to exchange the stored callable object with | 
Return value
(none)
See also
|   swaps the contents  (public member function of std::function<R(Args...)>)  |