* @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.
     */

## Overview

**Fess Crawler** is a powerful, flexible Java-based web crawling framework designed for enterprise-scale content extraction and processing. Built with a modular architecture, it supports multiple protocols (HTTP/HTTPS, File System, FTP, SMB, Cloud Storage) and provides extensive content extraction capabilities from various document formats.

### Key Features

A powerful Java library that provides intelligent search suggestion functionality built on top of OpenSearch/Elasticsearch. It offers auto-completion, query suggestions, and popular word analytics for search applications.

## Key Features

- **Smart Query Suggestions**: Real-time auto-completion and search suggestions
- **Multi-language Support**: Built-in support for Japanese text processing with Kuromoji analyzer

        assertEquals("value2", builder2.initialSettings.get("key"));
    }

    @Test
    public void testBuildMultipleInstances() {
        // Test that multiple SuggestSettings can be built from the same builder
        builder.setSettingsIndexName("MULTI_INDEX").addInitialSettings("multi.key", "multiValue").scrollTimeout("25s");

        SuggestSettings settings1 = builder.build(client, "id1");

  <mime-type type="application/macwriteii"/>

  <mime-type type="application/marc">
    <!-- todo add marc xml <marc:collection> -->
    <glob pattern="*.mrc"/>
    <magic priority="50">
      <!-- built from, e.g. https://www.loc.gov/marc/community/cileader.html -->
      <match value="[0-9]{5,5}" type="regex" offset="0">
        <match value="45" type="string" offset="20">
          <!-- bibliographic -->