docs: public static String filterTrustedResourceUri(SoyValue value) {
      value = normalizeNull(value);
      if (isSanitizedContentOfKind(value, SanitizedContent.ContentKind.TRUSTED_RESOURCE_URI)) {
        return value.coerceToString();
      }
      logger.log(Level.WARNING, "|filterTrustedResourceUri received bad value ''{0}''", value);
      return "about:invalid#" + EscapingConventions.INNOCUOUS_OUTPUT;
    }