* Failure to heed this advice can result in a {@link ClassCastException} being thrown by a cache
   * operation at some <i>undefined</i> point in the future.
   *
   * <p><b>Warning:</b> any exception thrown by {@code listener} will <i>not</i> be propagated to
   * the {@code Cache} user, only logged via a {@link Logger}.
   *
   * @return the cache builder reference that should be used instead of {@code this} for any