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            Move-assign a basic_waitable_timer from another.
          
template< typename Executor1> constraint_t< is_convertible< Executor1, Executor >::value, basic_waitable_timer & > operator=( basic_waitable_timer< Clock, WaitTraits, Executor1 > && other);
This assignment operator moves a timer from one object to another. Cancels any outstanding asynchronous operations associated with the target object.
                  The other basic_waitable_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_waitable_timer(const executor_type&)
            constructor.