}

  @SuppressWarnings("NullOptional")
  public void testFromJavaUtil() {
    assertNull(Optional.fromJavaUtil(null));
    assertEquals(Optional.absent(), Optional.fromJavaUtil(java.util.Optional.empty()));
    assertEquals(Optional.of("abc"), Optional.fromJavaUtil(java.util.Optional.of("abc")));
  }

  public void testAbsent() {
    Optional<String> optionalName = Optional.absent();

   */
  @SuppressWarnings("Java7ApiChecker")
  @IgnoreJRERequirement // Users will use this only if they're already using Optional.
  @CheckForNull
  public static <T> Optional<T> fromJavaUtil(@CheckForNull java.util.Optional<T> javaUtilOptional) {
    return (javaUtilOptional == null) ? null : fromNullable(javaUtilOptional.orElse(null));
  }

  /**