@class NSString; @protocol MTFlexiblePerfEventHandlerDelegate; @interface MTFlexiblePerfEventHandler : MTEventHandler <MTPerfBaseMeasurementTransformation> @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; @property (weak, nonatomic) id<MTFlexiblePerfEventHandlerDelegate> delegate; - (id)knownFields; - (id)metricsDataWithEventType:(id)a0 eventData:(id)a1; - (id)metricsDataWithPerfMeasurement:(id)a0; - (BOOL)mtIncludeBaseFields; - (id)xpSamplingPercentage:(id)a0; @end