assertNull(languageHelper.getSupportedLanguage(null));
        assertNull(languageHelper.getSupportedLanguage(""));
        assertNull(languageHelper.getSupportedLanguage("   "));
    }

    @Test
    public void test_setDetector() {
        // Test with null detector
        languageHelper.setDetector(null);
        assertNull(languageHelper.detector);
    }

    @Test

            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL));
            return null;
        }).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL));
            return null;
        });
        kuromojiService.store(body.dictId, entity);
        return asJson(

            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL));
            return null;
        }).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL));
            return null;
        });
        protwordsService.store(body.dictId, entity);
        return asJson(

        // The StoredLtrQueryBuilder.params() method requires non-null params
        // so this should throw a NullPointerException
        try {
            ltrQueryRescorer.evaluate(null);
            fail("Expected NullPointerException");
        } catch (NullPointerException e) {
            // Expected behavior - StoredLtrQueryBuilder requires non-null params
            assertNotNull(e);
        }
    }

        String[] tags = null;
        String[] roles = null;
        String[] fields = null;
        String[] excludes = null;

        String result = popularWordHelper.getCacheKey(seed, tags, roles, fields, excludes);

        assertNotNull(result);
        assertTrue(result.contains("test_seed"));

        // Should contain 4 separators even with null arrays

        doUpdate(entity, null);
    }

    public void insertOrUpdate(CrawlingInfoParam entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(CrawlingInfoParam entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

        doUpdate(entity, null);
    }

    public void insertOrUpdate(RoleType entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(RoleType entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(RoleType entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(UserInfo entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(UserInfo entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(UserInfo entity) {

        pathMappingHelper.setPathMappingList(sessionId, null);
        assertNull(pathMappingHelper.getPathMappingList(sessionId));
    }

    @Test
    public void test_removePathMappingList_withNullSessionId() {
        pathMappingHelper.removePathMappingList(null);
    }

    @Test
    public void test_getPathMappingList_withNullSessionId() {

     * @param level The parameter value of level. (NotNull)
     */
    public void setLevel(String level) {
        registerVariable("level", level);
    }

    /**
     * Set the value of hostname, used in parameter comment. <br>
     * Even if empty string, treated as empty plainly. So "IF pmb != null" is false if empty.