return client.prepareIndex(index);
    }

    @Override
    public ActionFuture<DeleteResponse> delete(final DeleteRequest request) {
        return client.delete(request);
    }

    @Override
    public void delete(final DeleteRequest request, final ActionListener<DeleteResponse> listener) {
        client.delete(request, listener);
    }

    @Override

import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.opensearch.action.bulk.BulkRequestBuilder;
import org.opensearch.action.bulk.BulkResponse;
import org.opensearch.action.delete.DeleteRequest;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.client.Client;
import org.opensearch.common.xcontent.json.JsonXContent;
import org.opensearch.core.action.ActionListener;