* Query rescorers allow modification of search scores after the initial query execution.
     *
     * @param rescorer the query rescorer to add
     */
    public void addQueryRescorer(final QueryRescorer rescorer) {
        queryRescorerList.add(rescorer);
    }

                return null; // Return null for this test
            }
        };

        queryHelper.addQueryRescorer(mockRescorer);

        java.util.Map<String, Object> params = new java.util.HashMap<>();
        org.opensearch.search.rescore.RescorerBuilder<?>[] rescorers = queryHelper.getRescorers(params);