assertEquals(0, c.getDeclaredConstructors().length, "Interfaces have no constructors");
    }

    @Test
    @DisplayName("Fields are public static final Strings with expected values")
    void fieldModifiersAndTypes() throws Exception {
        Map<String, String> expected = Map.of("SPNEGO_MECHANISM", "1.3.6.1.5.5.2", "KERBEROS_MECHANISM", "1.2.840.113554.1.2.2",