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            Move-construct a basic_deadline_timer from another.
          
basic_deadline_timer( basic_deadline_timer && other);
This constructor moves a timer from one object to another.
                  The other basic_deadline_timer 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_deadline_timer(const executor_type&)
            constructor.