*/
    public void addField(final String field) {
        fields.add(field);
    }

    /**
     * Adds a kind to filter by.
     * @param kind The kind.
     */
    public void addKind(final String kind) {
        kinds.add(kind);
    }

    /**
     * Sets whether to return detailed suggestion information.

    }

    @Test
    public void testConcatKinds() {
        // Test static concatKinds method
        SuggestItem.Kind[] kinds1 = { SuggestItem.Kind.QUERY };
        SuggestItem.Kind[] kinds2 = { SuggestItem.Kind.DOCUMENT, SuggestItem.Kind.QUERY };

        SuggestItem.Kind[] result = SuggestItem.concatKinds(kinds1, kinds2);

        assertNotNull(result);
        assertEquals(2, result.length); // Should not have duplicates

        item.kinds = new Kind[kinds.size()];
        for (int i = 0; i < kinds.size(); i++) {
            final String kind = kinds.get(i);
            if (kind.equals(Kind.DOCUMENT.toString())) {
                item.kinds[i] = Kind.DOCUMENT;
            } else if (kind.equals(Kind.QUERY.toString())) {
                item.kinds[i] = Kind.QUERY;
            } else if (kind.equals(Kind.USER.toString())) {

        boolQueryBuilder.must(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.DOCUMENT.toString()));
        boolQueryBuilder.mustNot(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.QUERY.toString()));
        boolQueryBuilder.mustNot(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.USER.toString()));

                .must(QueryBuilders.rangeQuery(FieldNames.DOC_FREQ).gte(1))
                .mustNot(QueryBuilders.matchPhraseQuery(FieldNames.KINDS, SuggestItem.Kind.QUERY.toString()))
                .mustNot(QueryBuilders.matchPhraseQuery(FieldNames.KINDS, SuggestItem.Kind.USER.toString())));
        if (deleteResponse.hasError()) {
            throw new SuggestIndexException(deleteResponse.getErrors().get(0));
        }

    /** The document frequency field. */
    public static final String DOC_FREQ = "docFreq";
    /** The user boost field. */
    public static final String USER_BOOST = "userBoost";
    /** The kinds field. */
    public static final String KINDS = "kinds";
    /** The timestamp field. */
    public static final String TIMESTAMP = "@timestamp";
    /** The tags field. */
    public static final String TAGS = "tags";
    /** The roles field. */

        // Check kind
        assertNotNull(suggestItem.getKinds());
        // The kinds array structure might be different
        boolean hasUserKind = false;
        for (SuggestItem.Kind kind : suggestItem.getKinds()) {
            if (kind == SuggestItem.Kind.USER) {
                hasUserKind = true;
                break;
            }
        }

     */
    protected QueryBuilder buildQuery() {
        final BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery();
        queryBuilder.must(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.QUERY.toString()));
        queryBuilder.mustNot(QueryBuilders.existsQuery(FieldNames.READING_PREFIX + "1"));
        queryBuilder.must(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(queryFreqThreshold));

	modelType := reflect.ValueOf(dest).Type()
	if modelType.Kind() == reflect.Ptr {
		modelType = modelType.Elem()
	}

	if modelType.Kind() != reflect.Struct {
		if modelType.Kind() == reflect.Interface {
			modelType = reflect.Indirect(reflect.ValueOf(dest)).Elem().Type()
		}

		for modelType.Kind() == reflect.Slice || modelType.Kind() == reflect.Array || modelType.Kind() == reflect.Ptr {
			modelType = modelType.Elem()
		}

					stmt.Dest = destValueCanAddr.Interface()
					destValue = destValueCanAddr.Elem()
				}

				switch destValue.Kind() {
				case reflect.Struct:
					stmt.AddError(field.Set(stmt.Context, destValue, value))
				default:
					stmt.AddError(ErrInvalidData)
				}
			}

			switch stmt.ReflectValue.Kind() {
			case reflect.Slice, reflect.Array:
				if len(fromCallbacks) > 0 {