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            Move-construct a basic_socket_acceptor from another.
          
basic_socket_acceptor( basic_socket_acceptor && other);
This constructor moves an acceptor from one object to another.
                  The other basic_socket_acceptor
                  object from which the move will occur.
                
            Following the move, the moved-from object is in the same state as if
            constructed using the basic_socket_acceptor(const executor_type&)
            constructor.