final IndexRequestBuilder indexRequestBuilder = new IndexRequestBuilder(client, IndexAction.INSTANCE, index);
                indexRequestBuilder.setId(item.getId()).setOpType(IndexRequest.OpType.INDEX).setSource(item.getSource());
                bulkRequestBuilder.add(indexRequestBuilder);
            }
        }

        final BulkResponse response = bulkRequestBuilder.execute().actionGet(settings.getBulkTimeout());

        assertNotNull(map.get(FieldNames.KINDS));
        assertNotNull(map.get(FieldNames.TIMESTAMP));
    }

    @Test
    public void testGetSource() {
        // Test getSource method
        String[] text = { "source", "test" };
        String[][] readings = { { "source" }, { "test" } };
        String[] fields = { "field1" };
        String[] tags = { "tag1" };

        if (!getResponse.isExists()) {
            return null;
        }
        final Map<String, Object> map = getResponse.getSource();
        return map.get(key);
    }

    /**
     * Retrieves a setting value as a String.
     * @param key The key of the setting.
     * @param defaultValue The default value if the setting is not found.

     */
    public String getId() {
        return id;
    }

    /**
     * Returns the source map of the suggest item.
     * @return The source map.
     */
    public Map<String, Object> getSource() {
        final Map<String, Object> map = new HashMap<>();
        map.put(FieldNames.TEXT, text);

        for (int i = 0; i < readings.length; i++) {

        final GetResponse response = getClient().get(c -> c.prepareGet().setIndex(index).setId(id).execute());
        if (response.isExists()) {
            final Map<String, Object> source = response.getSource();
            final T bean = BeanUtil.copyMapToNewBean(source, clazz, option -> {
                option.converter(new EsTimestampConverter(), timestampFields).excludeWhitespace();