@Test
    public void test_asContentResponse() {
        ViewHelper viewHelper = new ViewHelper();
        viewHelper.init();

        Map<String, Object> doc = new HashMap<>();
        doc.put("config_id", "test");
        doc.put("url", "http://example.com");

        try {
            viewHelper.asContentResponse(doc);
            assertTrue(true);
        } catch (Exception e) {

            public String getIndexFieldFavoriteCount() {
                return "favorite_count";
            }

            @Override
            public String getIndexFieldConfigId() {
                return "config_id";
            }

            @Override
            public String getIndexFieldLang() {
                return "lang";
            }

            @Override

    "properties": {
      "anchor": {
        "type": "keyword"
      },
      "boost": {
        "type": "float"
      },
      "click_count": {
        "type": "long"
      },
      "config_id": {
        "type": "keyword"
      },
      "important_content": {
        "type": "text",
        "analyzer": "standard_analyzer",
        "search_analyzer": "standard_search_analyzer",

    "properties": {
      "anchor": {
        "type": "keyword"
      },
      "boost": {
        "type": "float"
      },
      "click_count": {
        "type": "long"
      },
      "config_id": {
        "type": "keyword"
      },
      "important_content": {
        "type": "text",
        "analyzer": "standard_analyzer",
        "search_analyzer": "standard_search_analyzer",

    "properties": {
      "anchor": {
        "type": "keyword"
      },
      "boost": {
        "type": "float"
      },
      "click_count": {
        "type": "long"
      },
      "config_id": {
        "type": "keyword"
      },
      "important_content": {
        "type": "text",
        "analyzer": "standard_analyzer",
        "search_analyzer": "standard_search_analyzer",

index.field.favorite_count=favorite_count
# Field name for click count in the index.
index.field.click_count=click_count
# Field name for config ID in the index.
index.field.config_id=config_id
# Field name for expiration date in the index.
index.field.expires=expires
# Field name for URL in the index.
index.field.url=url
# Field name for document ID in the index.
index.field.doc_id=doc_id

    /** The key of the configuration. e.g. click_count */
    String INDEX_FIELD_click_count = "index.field.click_count";

    /** The key of the configuration. e.g. config_id */
    String INDEX_FIELD_config_id = "index.field.config_id";

    /** The key of the configuration. e.g. expires */
    String INDEX_FIELD_EXPIRES = "index.field.expires";

    /** The key of the configuration. e.g. url */

    public String getConfigId() {
        checkSpecifiedProperty("configId");
        return convertEmptyToNull(configId);
    }

    public void setConfigId(String value) {
        registerModifiedProperty("configId");
        this.configId = value;
    }

    public Integer getErrorCount() {
        checkSpecifiedProperty("errorCount");

        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setConfigId_SpanTerm(String configId) {
        setConfigId_SpanTerm("configId", null);
    }

    public void setConfigId_SpanTerm(String configId, ConditionOptionCall<SpanTermQueryBuilder> opLambda) {
        SpanTermQueryBuilder builder = regSpanTermQ("configId", configId);

    }

    public void setVersionNo(final Long version) {
        asDocMeta().version(version);
    }

    @Override
    public String toString() {
        return "FailureUrl [configId=" + configId + ", errorCount=" + errorCount + ", errorLog=" + errorLog + ", errorName=" + errorName
                + ", lastAccessTime=" + lastAccessTime + ", threadName=" + threadName + ", url=" + url + ", docMeta=" + docMeta + "]";
    }