* @param <Res> the type of the response
 */
public abstract class RequestBuilder<Req extends Request<Res>, Res extends Response> {
    /** The OpenSearch client. */
    protected Client client;
    /** The request being built. */
    protected Req request;

    /**
     * Constructor for RequestBuilder.
     * @param client The OpenSearch client.
     * @param request The request instance.
     */

        requestBuilder.header("Content-Length", contentLength.toString())
        requestBuilder.removeHeader("Transfer-Encoding")
      } else {
        requestBuilder.header("Transfer-Encoding", "chunked")
        requestBuilder.removeHeader("Content-Length")
      }
    }

    if (userRequest.header("Host") == null) {
      requestBuilder.header("Host", userRequest.url.toHostHeader())
    }

import org.codelibs.fess.suggest.request.RequestBuilder;
import org.opensearch.transport.client.Client;

/**
 * Builder for creating a {@link PopularWordsRequest} to fetch popular words.
 * This builder provides methods to set various parameters for the request.
 */
public class PopularWordsRequestBuilder extends RequestBuilder<PopularWordsRequest, PopularWordsResponse> {
    /**

import org.codelibs.fess.suggest.normalizer.Normalizer;
import org.codelibs.fess.suggest.request.RequestBuilder;
import org.opensearch.transport.client.Client;

/**
 * Builder class for constructing {@link SuggestRequest} instances.
 * This builder provides methods to set various parameters for the suggest request.
 */
public class SuggestRequestBuilder extends RequestBuilder<SuggestRequest, SuggestResponse> {
    /**

        val requestBuilder = HttpRequest.newBuilder().uri(URI(uri))
        if (githubToken.isPresent) {
            requestBuilder.header("Authorization", "token ${githubToken.get()}")
        }
        val response = HttpClient.newHttpClient().send(requestBuilder.build(), HttpResponse.BodyHandlers.ofString())
        if (response.statusCode() > 399) {

        try {
            final ListObjectsV2Request.Builder requestBuilder =
                    ListObjectsV2Request.builder().bucket(bucket).delimiter("/").maxKeys(maxItems);

            if (StringUtil.isNotBlank(prefix)) {
                final String normalizedPrefix = prefix.endsWith("/") ? prefix : prefix + "/";
                requestBuilder.prefix(normalizedPrefix);
            }

        final GetRequestBuilder requestBuilder = client.prepareGet(index, id);
        if (condition.build(requestBuilder)) {
            response = requestBuilder.execute().actionGet(ComponentUtil.getFessConfig().getIndexSearchTimeout());
        }
        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;

        requestBuilder.method("GET", null)
      } else {
        val requestBody = if (maintainBody) userResponse.request.body else null
        requestBuilder.method(method, requestBody)
      }
      if (!maintainBody) {
        requestBuilder.removeHeader("Transfer-Encoding")
        requestBuilder.removeHeader("Content-Length")
        requestBuilder.removeHeader("Content-Type")
      }
    }

            searchEngineClient.scrollSearch(fessConfig.getIndexDocumentUpdateIndex(), requestBuilder -> {
                requestBuilder.setQuery(queryBuilder).setSize((int) numFound);
                if (fields != null) {
                    requestBuilder.setFetchSource(fields, null);
                }
                return true;
            }, entity -> {

        try {
            final AtomicLong processedCount = new AtomicLong(0);
            final long count = searchEngineClient.scrollSearch(fessConfig.getIndexDocumentSearchIndex(), requestBuilder -> {
                requestBuilder.setQuery(query).setSize(scrollSize);
                return true;
            }, source -> {
                exportDocument(source, exportPath, excludeFields, resolvedFormatter);