private static void assertSystemPropertiesSet() {
    Map<String, String> props = getOldStyleProperties();

    Map<String, String> was = ourProps.get();
    if (Comparing.equal(was, props) && !itsTime()) {
      return;
    }

    ourProps.set(props);

    String message = getMessageFromProps(props);
    if (message != null) {
      // we only intend to somehow report possible misconfiguration
      // will not show to the user since on macOS this setting is typical
      LOG.info(message);
    }
  }
private static void assertSystemPropertiesSet()