virtual void DemoteDirtyTracker(int64 tracker_id) = 0;
virtual bool HasDemotedDirtyTracker() const = 0;
+ virtual bool IsDemotedDirtyTracker(int64 tracker_id) const = 0;
// Promotes single demoted dirty tracker to a normal dirty tracker.
virtual void PromoteDemotedDirtyTracker(int64 tracker_id) = 0;