static internal NSString ToKey(HKCorrelationTypeIdentifier kind)
        {
            switch (kind)
            {
            case HKCorrelationTypeIdentifier.BloodPressure:
                return(HKCorrelationTypeKey.IdentifierBloodPressure);

            case HKCorrelationTypeIdentifier.Food:
                return(HKCorrelationTypeKey.IdentifierFood);
            }
            return(null);
        }
 public static HKCorrelationType Create(HKCorrelationTypeIdentifier kind)
 {
     return(HKObjectType.GetCorrelationType(ToKey(kind)));
 }