docs: protected boolean isConfigLocation(URI location) {
          String scheme = location.getScheme();
          if (scheme == null) {
              // interpret as place holder
              try {
                  String resolvedPlaceholder = getProperty(location.getRawSchemeSpecificPart());
                  if (resolvedPlaceholder == null) {
                      return false;
                  }
                  location = new URI(resolvedPlaceholder);
                  scheme = location.getScheme();
              } catch (URISyntaxException e) {
                  return false;
              }
          }
          return (scheme != null && SUPPORTED_SCHEMES.contains(scheme.toLowerCase(StringUtil.LOCALE_INTERNAL)));
      }