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

            builder = QueryBuilders.boolQuery();
        } else {
            builder = QueryBuilders.boolQuery().must(queryBuilder);
        }
        boolQuery.accept(builder);
        if (builder.hasClauses()) {
            queryBuilder = builder;
        }
    }

    /**
     * Sets the query builder for this context.
     * @param queryBuilder The query builder to use.
     */