}

  @SuppressWarnings("NullOptional")
  public void testFromJavaUtil() {
    assertThat(Optional.fromJavaUtil(null)).isNull();
    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("NullableOptional") // Null passthrough is reasonable for type conversions
  @IgnoreJRERequirement // Users will use this only if they're already using Optional.
  public static <T> @Nullable Optional<T> fromJavaUtil(
      java.util.@Nullable Optional<T> javaUtilOptional) {
    return (javaUtilOptional == null) ? null : fromNullable(javaUtilOptional.orElse(null));
  }

  /**