@Override
    protected String formatDate(Date date) {
      long time = date.getTime() + random.nextInt(100_000) * 1_000;
      date = new Date(time);
      return super.formatDate(date);
    }
Ignores {@code date} and returns the timestamp for a random date.
geode-core/src/test/java/org/apache/geode/internal/logging/SortLogFileTest.java