code: public static boolean isLegacyFeedbackClassesEnabled() {
  		String legacyErrorClasses = getInitParam("net.bootsfaces.legacy_error_classes");
  		legacyErrorClasses=evalELIfPossible(legacyErrorClasses);
  		return legacyErrorClasses.equalsIgnoreCase("true") || legacyErrorClasses.equalsIgnoreCase("yes");
  	}
docs: It checks where the framework should place BS feedback classes.
  
  @return