true if this duration is non-zero.Duration.opCast
deprecated
TickDuration is Deprecated
Returns a TickDuration with the same number of hnsecs as this
Duration.
Note that the conventional way to convert between Duration and
TickDuration is using to, e.g.:
duration.to!TickDuration()bool opCast(T : bool)() const nothrow @nogcAllow Duration to be used as a boolean.