}

    /**
     * Checks whether the SID is blank (all sub-authorities zero).
     *
     * @return whether the SID is blank (all sub-authorities zero)
     */
    public boolean isBlank() {
        boolean blank = true;
        for (final int sub : this.sub_authority) {
            blank = blank && sub == 0;
        }
        return blank;
    }

    /**
     *
     * @return domain SID

          </description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>
        <field xdoc.separator="blank">
          <name>proxies</name>
          <version>1.0.0+</version>
          <description>
            Configuration for different proxy profiles. Multiple proxy profiles

        super.setUp();
        notificationHelper = new NotificationHelper();
    }

    public void test_sendToSlack_withBlankWebhookUrls() {
        // Setup mock configuration with blank webhook URLs
        ComponentUtil.setFessConfig(new MockFessConfig() {
            @Override
            public String getSlackWebhookUrls() {
                return "";
            }
        });

        // Verify
        assertTrue(result.isPresent());
        assertEquals(Locale.UK, result.get());
    }

    // Test findBusinessLocale with blank parameter name
    public void test_findBusinessLocale_withBlankParameterName() {
        // Setup mock config with blank parameter name
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getQueryBrowserLangParameterName() {

          <description>The base version (i.e. ending in {@code -SNAPSHOT}) when this directory represents a "groupId/artifactId/version" for a SNAPSHOT.</description>
        </field>
        <field xdoc.separator="blank">
          <name>plugins</name>
          <version>1.0.0+</version>
          <description>The set of plugins when this directory represents a "groupId".</description>
          <association>
            <type>Plugin</type>

        chars[0] = Character.toUpperCase(chars[0]);
        return new String(chars);
    }

    /**
     * Returns true if the string is blank.
     *
     * @param str
     *            the string to check
     * @return {@literal true} if the string is blank
     */
    public static boolean isBlank(final String str) {
        if (str == null || str.length() == 0) {
            return true;
        }

        </field>
        <field xdoc.separator="blank">
          <name>mojos</name>
          <version>1.0.0+</version>
          <association>
            <type>MojoDescriptor</type>
            <multiplicity>*</multiplicity>
          </association>
          <description>Description of each Mojo provided by the plugin.</description>
        </field>
        <field xdoc.separator="blank">
          <name>dependencies</name>

        if (StringUtil.isBlank(endpoint)) {
            throw new CrawlingAccessException("endpoint is blank.");
        }
        builder.endpoint(endpoint);
        final String accessKey = getInitParameter("accessKey", null, String.class);
        if (StringUtil.isBlank(accessKey)) {
            throw new CrawlingAccessException("accessKey is blank.");
        }
        final String secretKey = getInitParameter("secretKey", null, String.class);

      val blank = readUtf8LineStrict()

      if (MAGIC != magic ||
        VERSION_1 != version ||
        appVersion.toString() != appVersionString ||
        valueCount.toString() != valueCountString ||
        blank.isNotEmpty()
      ) {
        throw IOException(
          "unexpected journal header: [$magic, $version, $valueCountString, $blank]",
        )
      }

        // Test empty string (should be valid)
        bean.setCronExpression("");
        violations = validator.validate(bean);
        assertTrue(violations.isEmpty());

        // Test blank string (should be valid)
        bean.setCronExpression("   ");
        violations = validator.validate(bean);
        assertTrue(violations.isEmpty());
    }

    // Test validation with invalid cron expressions