code: @VisibleForTesting
      static Function<CronField, CronField> returnAlwaysExpression(final CronFieldName name) {
          return field -> new CronField(name, always(), FieldConstraintsBuilder.instance().forField(name).createConstraintsInstance());
      }
docs: Creates a Function that returns an Always instance.
  
  @param name - Cron field name
  @return new CronField -> CronField instance, never null