* <li>Exactly one of {@link #currentTime()} or {@link #withTime(long)} must
* have been called.</li>
* <li>The {@link #withText(String) text} must not be {@code null} and must
* <li>Exactly one of {@link #currentTime()} or {@link #withTime(long)} must
* have been called.</li>
* <li>The {@link #withText(String) text} must not be {@code null} and must