docs: private boolean processAttributeElement(HttpMessage message, int depth, String baseURL, Element element,
  			String attributeName) {
  		// The URL as written in the attribute (can be relative or absolute)
  		String localURL = element.getAttributeValue(attributeName);
  		if (localURL == null) {
  			return false;
  		}
  
  		processURL(message, depth, localURL, baseURL);
  		return true;
  	}