@class NSDictionary, NSMutableDictionary; @interface ARFrameTimingData : NSObject { NSMutableDictionary *_timestampsByDataClassKey; } @property (nonatomic) double videoLatency; @property (readonly, nonatomic) NSDictionary *timestamps; - (id)init; - (void).cxx_destruct; - (void)addTimestamp:(double)a0 forDataOfClass:(Class)a1; @end