@class NSString; @interface HKHistogramChartData : NSObject <HKGraphSeriesChartData> @property (readonly, nonatomic) double xValue; @property (readonly, nonatomic) double yValue; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)initWithXValue:(double)a0 yValue:(double)a1; @end