public static boolean validateAssuranceLevel(int assuranceLevel) {
        return numberMap.entrySet()
                .stream()
                .filter(entry -> Objects.equals(entry.getValue(), assuranceLevel))
                .findFirst()
                .map(Map.Entry::getKey)
                .isPresent();
    }
@Test
    void foundAssuranceLevel() {
       boolean result = LevelOfAssurance.validateAssuranceLevel(30);
       assertTrue(result);
    }