docs: @Pure
  	public static URL getAttributeURLWithDefault(Node document, boolean caseSensitive, URL defaultValue, String... path) {
  		assert document != null : AssertMessages.notNullParameter(0);
  		final String v = getAttributeValue(document, caseSensitive, 0, path);
  		if (v != null && !v.isEmpty()) {
  			final URL url = FileSystem.convertStringToURL(v, true);
  			if (url != null) {
  				return url;
  			}
  		}
  		return defaultValue;
  	}