in src/main/java/software/amazon/qldb/ResultRetriever.java [198:205]
private Retriever(Session session, String txnId, String nextPageToken, IOUsage ioUsage, TimingInformation timingInfo) {
this.session = session;
this.txnId = txnId;
this.nextPageToken = nextPageToken;
this.accumulatedReadIOs = (ioUsage != null) ? ioUsage.getReadIOs() : null;
this.accumulatedWriteIOs = (ioUsage != null) ? ioUsage.getWriteIOs() : null;
this.accumulatedProcessingTimeMilliseconds = (timingInfo != null) ? timingInfo.getProcessingTimeMilliseconds() : null;
}