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Reset the cancellation state associated with the coroutine.
template< typename InFilter, typename OutFilter> void reset_cancellation_state( InFilter && in_filter, OutFilter && out_filter) const;
            Let P be the cancellation
            slot associated with the current coroutine's spawn completion handler. Assigns
            a new cancellation_state object S, constructed as S(P, std::forward<InFilter>(in_filter), std::forward<OutFilter>(out_filter)), into the current coroutine's cancellation
            state object.