@interface HKHeartRateVariabilityUtilities : NSObject + (id)_hrvType; + (id)_sequenceType; + (void)deleteHRVSample:(id)a0 healthStore:(id)a1 predicate:(id)a2 options:(unsigned long long)a3 completion:(id /* block */)a4; + (void)deleteHRVSamplesFromStartDate:(id)a0 endDate:(id)a1 predicate:(id)a2 options:(unsigned long long)a3 healthStore:(id)a4 completion:(id /* block */)a5; + (id)instantaneousBPMsForHeartbeatSeriesSample:(id)a0; + (void)queryForParentSequenceOfHRV:(id)a0 healthStore:(id)a1 completion:(id /* block */)a2; @end