public static bool operator !=(ComparableString field, DateTime value)
 {
     if ((object)field == null)
     {
         return(value != null);
     }
     else
     {
         return(field.Value != Jira.FormatDateTimeString(value));
     }
 }
 public static bool operator >=(ComparableString field, DateTime value)
 {
     return(field.Value.CompareTo(Jira.FormatDateTimeString(value)) >= 0);
 }