public static String findRedenOpschorting(List<Container> categorieList){
        return findValue(categorieList, CATEGORIE_INSCHRIJVING, ELEMENT_REDEN_OPSCHORTING);
    }
@Test
    public void testFindDRedenOpschorting() {
        assertThat(CategorieUtil.findRedenOpschorting(createFullCategories()), is("redenopschorting"));
    }