*       UncheckedExecutionException} (if the cause is an {@code Exception}) or {@link
   *       ExecutionError} (if the cause is an {@code Error}).
   *   <li>Any {@link InterruptedException} causes a retry of the {@code get} call. The interrupt is
   *       restored before {@code getUnchecked} returns.
   *   <li>Any {@link CancellationException} is propagated untouched. So is any other {@link