in src/main/java/software/amazon/qldb/tutorial/qldb/RevisionMetadata.java [133:141]
public boolean equals(Object o) {
if (this == o) { return true; }
if (o == null || getClass() != o.getClass()) { return false; }
RevisionMetadata metadata = (RevisionMetadata) o;
return version == metadata.version
&& id.equals(metadata.id)
&& txTime.equals(metadata.txTime)
&& txId.equals(metadata.txId);
}