final CurlRequest getRequest = Curl.get(emptyUrl);
        final CurlRequest postRequest = Curl.post(emptyUrl);
        final CurlRequest putRequest = Curl.put(emptyUrl);
        final CurlRequest deleteRequest = Curl.delete(emptyUrl);
        final CurlRequest headRequest = Curl.head(emptyUrl);
        final CurlRequest optionsRequest = Curl.options(emptyUrl);
        final CurlRequest connectRequest = Curl.connect(emptyUrl);

        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.common.xcontent.json.JsonXContent;
import org.opensearch.core.action.ActionListener;
import org.opensearch.core.xcontent.XContentBuilder;

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

    /**
     * Deletes a document asynchronously with a callback.
     *
     * @param request  the delete request
     * @param listener the response listener
     */
    @Override
    public void delete(final DeleteRequest request, final ActionListener<DeleteResponse> listener) {