@protocol MTMediaActivityEventHandlerDelegate; @interface MTMediaActivityEventHandler : MTEventHandler @property (weak, nonatomic) id<MTMediaActivityEventHandlerDelegate> delegate; - (id)knownFields; - (void)didCreateMetricsData:(id)a0; - (id)eventVersion:(id)a0; - (id)metricsDataForStartActionWithPosition:(unsigned long long)a0 overallPosition:(unsigned long long)a1 type:(id)a2 reason:(id)a3 eventData:(id)a4; - (id)metricsDataForStopActionWithPosition:(unsigned long long)a0 overallPosition:(unsigned long long)a1 type:(id)a2 reason:(id)a3 startMetricsData:(id)a4 eventData:(id)a5; @end