@class HKQuantity; @interface HDHeartRateSensorDatum : HDQuantityDatum @property (readonly, nonatomic) HKQuantity *heartRate; @property (readonly, nonatomic) long long heartRateContext; + (BOOL)supportsSecureCoding; - (void)encodeWithCoder:(id)a0; - (id)initWithCoder:(id)a0; - (id)initWithIdentifier:(id)a0 dateInterval:(id)a1 heartRate:(id)a2 heartRateContext:(long long)a3 resumeContext:(id)a4; @end