code: private int compareToTimestamp(int currentResult, VersionIdentifier otherVersion) {
  
      return compareToLinear(currentResult, getTimestamp(), otherVersion.getTimestamp(), otherVersion);
    }
docs: This method performs the part of {@link #compareTo(VersionIdentifier)} for the {@link #getTimestamp()
  timestamp}.
  
  @param currentResult is the current result so far.
  @param otherVersion is the {@link VersionIdentifier} to compare to.
  @return the result of comparison.