@Override
  public int compareTo(RVVException o) {
    long thisVal = previousVersion;
    long anotherVal = o.previousVersion;
    return (thisVal < anotherVal ? -1 : (thisVal == anotherVal ? 0 : 1));
  }
checks to see if any of the received versions can be merged into the start/end version numbers
geode-core/src/main/java/org/apache/geode/internal/cache/versions/RVVExceptionB.java