@class NSDictionary, HKQuantity; @interface HDQuantityDatum : HDDataCollectorSensorDatum @property (readonly, copy, nonatomic) HKQuantity *quantity; @property (readonly, copy, nonatomic) NSDictionary *metadata; @property (copy, nonatomic) id /* block */ saveCompletion; + (BOOL)supportsSecureCoding; + (id)hdt_quantityDatumForType:(id)a0 startTime:(double)a1 endTime:(double)a2 value:(double)a3; + (id)quantityDataForDifferencesInData:(id)a0 baseDatum:(id)a1 unit:(id)a2 differenceHandler:(id /* block */)a3 intervalHandler:(id /* block */)a4; + (id)quantityDatumWithHKQuantityDatum:(id)a0 metadata:(id)a1; - (unsigned long long)hash; - (void)encodeWithCoder:(id)a0; - (id)description; - (void).cxx_destruct; - (BOOL)isEqual:(id)a0; - (id)initWithCoder:(id)a0; - (id)datumForChangeSince:(id)a0 newIdentifier:(id)a1 newResumeContext:(id)a2; - (id)initWithIdentifier:(id)a0 dateInterval:(id)a1 quantity:(id)a2 metadata:(id)a3 resumeContextProvider:(id /* block */)a4; - (id)initWithIdentifier:(id)a0 dateInterval:(id)a1 resumeContext:(id)a2 quantity:(id)a3; @end