val changeRequest = DataTypes.HEART_RATE.changedDataRequestBuilder
    .setChangeTimeFilter(localTimeFilter.of(lastSyncTime, now)
    .build()

val results = healthDataStore.readChangesAsync(changeRequest).get().dataList

results.forEach { change ->
    if(change.changeType == ChangeType.UPSERT) {
        val upsertDataPoint = change.upsertDataPoint
        // Handle the inserted or updated DataPoint
    } else if(change.changeType == ChangeType.DELETE) {
        val deletedDataUid = change.deleteDataUid
        // Handle the deleted data uid
    }
}