@interface ARSystemTimeSnapshot : NSObject @property (readonly, nonatomic) double upTime; @property (readonly, nonatomic) double upTimeIncludingSleep; @property (readonly, nonatomic) double upTimeIncludingSleepAndDriftCorrection; + (id)timeSinceSnapshot:(id)a0; - (id)init; - (id)description; - (id)initWithUpTime:(double)a0 upTimeIncludingSleep:(double)a1 upTimeIncludingSleepAndDriftCorrection:(double)a2; - (id)timeSinceSnapshot:(id)a0; @end