webhooks, err := GetWebhooksWithTag(ctx, kubeClient, tagName)
	if err != nil {
		return fmt.Errorf("failed to retrieve tag with name %s: %v", tagName, err)
	}
	if len(webhooks) == 0 {
		return fmt.Errorf("cannot remove tag %q: cannot find MutatingWebhookConfiguration for tag", tagName)
	}

	tcs := []struct {
		name        string
		webhook     admitv1.MutatingWebhookConfiguration
		tagName     string
		whURL       string
		whSVC       string
		whCA        string
		numWebhooks int
	}{
		{
			name:        "webhook-pointing-to-service",
			webhook:     revisionCanonicalWebhook,
			tagName:     "canary",
			whURL:       "",
			whSVC:       "istiod-revision",
			whCA:        "ca",

            target.append("<${element.tagName}")
            for (int i = 0; i < element.attributes.length; i++) {
                Attr attr = element.attributes.item(i)
                target.append(" $attr.name=\"$attr.value\"")
            }

            element.childNodes.findAll { it instanceof Text }.each {
                assert it.textContent != null : "Found null text element in <$element.tagName>"
            }

		if se, ok := t.(xml.StartElement); ok {
			tagName := se.Name.Local
			switch tagName {
			case "AllowQuotedRecordDelimiter":
				var b bool
				if err = d.DecodeElement(&b, &se); err != nil {
					return err
				}
				args.AllowQuotedRecordDelimiter = b
			default:
				var s string
				if err = d.DecodeElement(&s, &se); err != nil {
					return err
				}
				switch tagName {
				case "FileHeaderInfo":

        // start of tag marker
        scanner.next(2);

        // tag name
        scanner.mark();
        scanner.find(END_TAG_NAME);
        String tagName = scanner.region();
        visitor.onStartJavadocTag(tagName);
        scanner.skip(WHITESPACE_WITH_EOL);

        // value
        if (!scanner.lookingAt('}')) {
            scanner.mark();
            scanner.find('}');

  <defaults>
    <default>
      <key>package</key>
      <value>org.apache.maven.cli.internal.extension.model</value>
    </default>
  </defaults>

  <classes>
    <class rootElement="true" xml.tagName="extensions" xsd.compositor="sequence">
      <name>CoreExtensions</name>
      <description>Extensions to load.</description>
      <version>1.0.0+</version>
      <fields>
        <field>

}

// GetWebhookRevision extracts tag target revision from webhook object.
func GetWebhookRevision(wh admitv1.MutatingWebhookConfiguration) (string, error) {
	if tagName, ok := wh.ObjectMeta.Labels[label.IoIstioRev.Name]; ok {
		return tagName, nil
	}
	return "", fmt.Errorf("could not extract tag revision from webhook")
}

// DeleteTagWebhooks deletes the given webhooks.

      <value>org.apache.maven.artifact.repository.metadata</value>
    </default>
  </defaults>
  <classes>
    <class rootElement="true" xml.tagName="metadata" java.clone="deep">
      <name>Metadata</name>
      <version>1.0.0+</version>
      <fields>
        <field xml.attribute="true" xml.tagName="modelVersion">
          <name>modelVersion</name>
          <version>1.1.0+</version>
          <type>String</type>

            return true;
        }
        return false;
    }

    public void addChildUrlRule(final String tagName, final String attrName) {
        if (StringUtil.isNotBlank(tagName) && StringUtil.isNotBlank(attrName)) {
            childUrlRuleMap.put(tagName, attrName);
        }
    }

    protected XPathAPI getXPathAPI() {
        XPathAPI cachedXPathAPI = xpathAPI.get();

  <defaults>
    <default>
      <key>package</key>
      <value>org.apache.maven.usability.plugin</value>
    </default>
  </defaults>
  <classes>
    <class rootElement="true" xml.tagName="paramdoc">
      <version>1.0.0</version>
      <name>ExpressionDocumentation</name>
      <description>The root of a parameter plugin expression document.</description>
      <fields>
        <field>