.collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("headers", headerMap);
        sourceMap.put("documents", documentList);
        return sourceMap;
    }

    @Override
    protected void addFieldToSource(final Map<String, Object> sourceMap, final String field, final Object value) {

        try {
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), queryBuilder);

        } catch (final Exception e) {
            logger.error("Could not delete expired documents: {}", queryBuilder, e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

            final CountDownLatch latch = new CountDownLatch(1);

            logger.info("Parsing words from indexed documents.");
            suggestHelper.indexFromDocuments(ret -> {
                logger.info("Success indexing from documents.");
                latch.countDown();
            }, t -> {
                logger.error("Failed to update suggest index.", t);

Directory for auto-generated documents

```

### Add suggest documents from source of index

```java
DocumentReader reader = new ESSourceReader(
    client,
    suggester.settings(),
    "contentIndexName",
    "contentTypeName");
suggester.indexer().indexFromDocument(reader, 2, 100).getResponse();
```

### Add suggest document from queryLog

```java

In this README:

- [Introduction](#introduction)
- [Repositories](#repositories)
- [Issue management](#issue-management)

In addition, here are some other documents you may wish to read:

- [Istio Community](https://github.com/istio/community#istio-community) - describes how to get involved and contribute to the Istio project

labels.dashboard_title_configuration	=	Configuration du système
labels.suggest_search_log_enabled	=	Suggérer à partir de mots de recherche
labels.suggest_documents_enabled	=	Suggérer à partir de documents
labels.purge_suggest_search_log_day	=	Purger les documents suggérés avant
labels.crawling_info_title	=	Informations d'exploration
labels.crawling_info_title_confirm	=	Informations d'exploration
labels.crawling_info_button_back	=	Retour

<?xml version="1.0" encoding="UTF-8"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
  <ShortName>Fess</ShortName>
  <Description>Full Text Search for Your Documents.</Description>
  <Tags>Full Text Search</Tags>
  <Contact>******@****.***</Contact>
  <SearchForm>http://localhost:8080/fess/</SearchForm>
  <Url type="text/html" template="http://localhost:8080/fess/search?q={searchTerms}"/>
  <InputEncoding>UTF-8</InputEncoding>

* Do not change the paths in links to images, code files, Markdown documents.

* However, when a Markdown document is translated, the `#hash-parts` in links to its headings may change. Update these links if possible.
    * Search for such links in the translated document using the regex `#[^# ]`.
    * Search in all documents already translated into your language for `your-translated-document.md`. For example VS Code has an option "Edit" -> "Find in Files".

String[] roles = new String[] { "role1", "role2", "role3" };
suggester.indexer().index(new SuggestItem(new String[] { "検索", "エンジン" }, readings, 1, tags, roles, SuggestItem.Kind.DOCUMENT));
```

### Add suggest documents from source of index

Elasticsearchにインデックスされているコンテンツを解析してサジェストドキュメントを生成します。

```java
DocumentReader reader = new ESSourceReader(
    client,
    suggester.settings(),