@Required
    @Size(max = 10000)
    public String urlExpr;

    /** Boost expression to apply to matching documents */
    @Required
    @Size(max = 10000)
    public String boostExpr;

    /** Sort order for displaying boost configurations */
    @Required
    @Min(value = 0)
    @Max(value = 2147483647)
    @ValidateTypeFailure
    public Integer sortOrder;

    /** User who created this configuration */

    public String content;

    /**
     * The virtual host for which this related content applies.
     */
    @Size(max = 1000)
    public String virtualHost;

    /**
     * The sort order for this related content (0-2147483647).
     */
    @Min(value = 0)
    @Max(value = 2147483647)
    @ValidateTypeFailure
    public Integer sortOrder;

    /**

	if err != nil {
		return err
	}

	wk, err := workers.New(workerSize)
	if err != nil {
		// invalid worker size.
		return err
	}

	ctx, cancelCause := context.WithCancelCause(ctx)
	defer cancelCause(nil)

	results := make(chan itemOrErr[ObjectInfo], workerSize)
	go func() {
		prefixes := r.Prefix.F()

  @Override
  public String[] createArray(int length) {
    return new String[length];
  }

  /** Returns the original element list, unchanged. */
  @Override
  public List<String> order(List<String> insertionOrder) {
    return insertionOrder;
  }

+ If there is a corresponding issue, add either `Fixes #1234` or `Updates #1234`
  (the latter if this is not a complete fix) to this comment
+ If referring to a repo other than `golang/go` you can use the
  `owner/repo#issue_number` syntax: `Fixes golang/tools#1234`
+ We do not use Signed-off-by lines in Go. Please don't add them.
  Our Gerrit server & GitHub bots enforce CLA compliance instead.

		content_length, last_modified および mimetype になります。
		設定で指定するフィールドは変更することができます。
	</dd>
	<dt>ソート</dt>
	<dd>
		sort 演算子は指定したフィールド名でドキュメントをソートします。
		sort 演算子の利用方法は sort:&lt;field&gt;.&lt;order&gt; になります。
		&lt;order&gt; は asc または desc で昇順・降順を指定できます。
		たとえば、Fess を含むドキュメントでサイズの降順にソートしたい場合、次のように入力します。
		<pre>Fess sort:content_length.desc</pre>
		標準で利用可能なフィールドは created, content_length および last_modified になります。

     * unable to do so.
     */
    static GetCheckedTypeValidator getBestValidator() {
      return weakSetValidator();
    }
  }

  // TODO(cpovirk): change parameter order to match other helper methods (Class, Throwable)?
  private static <X extends Exception> void wrapAndThrowExceptionOrError(
      Throwable cause, Class<X> exceptionClass) throws X {
    if (cause instanceof Error) {

  @Override
  public UnhashableObject[] createArray(int length) {
    return new UnhashableObject[length];
  }

  @Override
  public Iterable<UnhashableObject> order(List<UnhashableObject> insertionOrder) {
    return insertionOrder;
  }

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