docs: public String getTimestampVersion()
      {
          if ( timestampVersion == null )
          {
              if ( timestamp != null )
              {
                  assert isSnapshot();
                  SimpleDateFormat fmt = new SimpleDateFormat( "yyyyMMdd.HHmmss" );
                  fmt.setTimeZone( TimeZone.getTimeZone( "GMT" ) );
                  timestampVersion = MessageFormat.format( "{0}-{1}-{2}", new Object[]{
                      this.version.substring( 0, this.version.length() - "-SNAPSHOT".length() ),
                      fmt.format( new Date( timestamp.longValue() ) ), buildNumber } );
              }
              else
              {
                  timestampVersion = version;
              }
          }
          return timestampVersion;
      }