public static PsiElement getElementToMatch(XmlAttributeValue attributeValue) {
    final PsiElement child = attributeValue.getFirstChild();
    if (!(child instanceof XmlToken token)) {
      return null;
    }
    if (token.getTokenType() != XmlTokenType.XML_ATTRIBUTE_VALUE_START_DELIMITER) {
      return null;
    }
    final PsiElement sibling = child.getNextSibling();
    if (!(sibling instanceof XmlToken secondToken)) {
      return sibling;
    }
    return (secondToken.getTokenType() == XmlTokenType.XML_ATTRIBUTE_VALUE_END_DELIMITER) ? null : secondToken;
  }
public static PsiElement getElementToMatch(XmlAttributeValue attributeValue)