/// If this query is completed, returns `Some(duration)` of how
/// long it took
If this query is completed, returns `Some(duration)` of how
long it took
If this query is completed returns ` Some ( duration ) ` of how long it took
pub fn query_completed_duration(&self) -> Option<Duration> {
        match self
            .query_completed_duration
            .load(atomic::Ordering::Relaxed)
        {
            UNCOMPLETED_DURATION => None,
            d => Some(Duration::from_nanos(d as u64)),
        }
    }
pub fn query_completed_duration ( & self ) -> Option < Duration > { match self . query_completed_duration . load ( atomic :: Ordering :: Relaxed ) { UNCOMPLETED_DURATION => None , d => Some ( Duration :: from_nanos ( d as u64 ) ) , } }
If this query is completed, returns `Some(duration)` of how
long it took
If this query is completed returns ` Some ( duration ) ` of how long it took
&self