public static FieldScope none() {
    return FieldScopeImpl.none();
  }
@Test
  public void testFieldScopes_none() {
    Message message = parse("o_int: 3 r_string: \"foo\"");
    Message diffMessage = parse("o_int: 5 r_string: \"bar\"");

    expectThat(diffMessage).ignoringFieldScope(FieldScopes.none()).isNotEqualTo(message);
    expectThat(diffMessage).withPartialScope(FieldScopes.none()).isEqualTo(message);

    expectFailureWhenTesting()
        .that(diffMessage)
        .withPartialScope(FieldScopes.none())
        .isNotEqualTo(message);
    expectIsNotEqualToFailed();
    expectThatFailure().hasMessageThat().contains("ignored: o_int");
    expectThatFailure().hasMessageThat().contains("ignored: r_string");
  }