public static DateTime ToDateTimeOrUtcNow(DateTimePeriodGroup dateTimePeriodGroup)
 {
     return(DateTimePeriodConverter.ToDateTime(dateTimePeriodGroup) ?? DateTime.UtcNow);
 }
 public static DateTime?ToDateTime(DateTimePeriodGroup dateTimePeriodGroup)
 {
     return(DateTimePeriodConverter.ToDateTime(dateTimePeriodGroup));
 }