// a waiter.
    // requireNonNull is safe because valueField is always set before TOMBSTONE.
    return getDoneValue(requireNonNull(valueField));
  }

  /** Constructor for use by {@link AbstractFuture}. */
  AbstractFutureState() {}

  /*
   * We put various static objects here rather than in AbstractFuture so that they're initialized in

 * resulting {@code CharSink} will written to the {@code ByteSink} as encoded bytes.
 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class CharSink {

  /** Constructor for use by subclasses. */
  protected CharSink() {}

  /**
   * Opens a new {@link Writer} for writing to this sink. This method returns a new, independent
   * writer each time it is called.
   *

    @SuppressWarnings({"unchecked", "rawtypes"}) // needed for arrays
    public Collection<Integer>[] createValueArray(int length) {
      return new ImmutableSet[length];
    }
  }

  /**
   * Useless constructor for a class of static utility methods.
   *
   * @deprecated Do not instantiate this utility class.
   */
  @Deprecated
  public MapGenerators() {}

 * URL encoding, and other document-related operations. It's designed as a final
 * utility class with only static methods.
 *
 */
public final class DocumentUtil {

    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private DocumentUtil() {
        // Utility class - no instantiation
    }

    /**
     * Gets a typed value from a document map with a default value.

     * Used to retrieve paging and other configuration parameters.
     */
    @Resource
    protected FessConfig fessConfig;

    /**
     * Creates a new instance of DataConfigService.
     * This constructor initializes the service for managing data configuration operations
     * including CRUD operations and search functionality.
     */
    public DataConfigService() {
        super();
    }

    /**

import jakarta.annotation.Resource;

/**
 * Admin action for Crawling Info management.
 *
 */
public class AdminCrawlinginfoAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminCrawlinginfoAction() {
        super();
    }

    /** The role for this action. */
    public static final String ROLE = "admin-crawlinginfo";

import jakarta.annotation.Resource;

/**
 * Admin action for Failure URL management.
 *
 */
public class AdminFailureurlAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminFailureurlAction() {
        super();
    }

    /**
     * Role name for failure URL administration.
     */
    public static final String ROLE = "admin-failureurl";

import jakarta.annotation.Resource;

/**
 * Admin action for Job Log.
 *
 */
public class AdminJoblogAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminJoblogAction() {
        super();
    }

    /** The role name for job log administration. */
    public static final String ROLE = "admin-joblog";

import jakarta.annotation.Resource;

/**
 * API action for admin data config.
 *
 */
public class ApiAdminDataconfigAction extends FessApiAdminAction {

    /**
     * Default constructor.
     */
    public ApiAdminDataconfigAction() {
        super();
    }

    private static final Logger logger = LogManager.getLogger(ApiAdminDataconfigAction.class);

 * > request through the use of a URI Template.
 *
 * [doh_spec]: https://tools.ietf.org/html/draft-ietf-doh-dns-over-https-13
 */
class DnsOverHttps internal constructor(
  @get:JvmName("client") val client: OkHttpClient,
  @get:JvmName("url") val url: HttpUrl,
  @get:JvmName("includeIPv6") val includeIPv6: Boolean,
  @get:JvmName("post") val post: Boolean,