boolQuery.should(queryBuilder);
                    break;
                case MUST_NOT:
                    boolQuery.mustNot(queryBuilder);
                    break;
                default:
                    break;
                }
            }
        }
        if (boolQuery.hasClauses()) {
            return boolQuery;
        }
        return null;
    }

            if (list.size() == 1) {
                return list.get(0);
            }
            if (list.size() > 1) {
                final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
                list.forEach(boolQuery::should);
                return boolQuery;
            }
            return null;
        }).filter(q -> q != null).toArray(n -> new QueryBuilder[n]);

        if (queryBuilders.length == 1) {

     * @param boolQuery Consumer that configures the boolean query.
     */
    public void addQuery(final Consumer<BoolQueryBuilder> boolQuery) {
        BoolQueryBuilder builder;
        if (queryBuilder instanceof MatchAllQueryBuilder) {
            builder = QueryBuilders.boolQuery();
        } else {
            builder = QueryBuilders.boolQuery().must(queryBuilder);
        }

    /**
     * Builds the OpenSearch query for popular words.
     * @return The QueryBuilder instance.
     */
    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"));