Method WaitT

util/system/condvar.h:37–39

* returns false if failed by timeout */

     * returns false if failed by timeout
     */
    inline bool WaitT(TMutex& m, TDuration timeout) noexcept {
        return WaitD(m, timeout.ToDeadLine());
    }

    template <typename P>
    inline bool WaitT(TMutex& m, TDuration timeout, P pred) noexcept {