isValid method
Implementation
bool isValid(){
if (id == null || id?.trim() == '') return false;
if (documentTypeId == null || documentTypeId?.trim() == '') return false;
if (prefix == null || prefix?.trim() == '') return false;
if (from == null) return false;
if (to == null) return false;
if (consecutive == null) return false;
if (number == null || number?.trim() == '') return false;
if (dateFrom == null || dateFrom?.trim() == '') return false;
if (dateTo == null || dateTo?.trim() == '') return false;
if (technicalKey == null || technicalKey?.trim() == '') return false;
if (isExpired == null ) return false;
//if (isActive == null) return false;
if (createdAt == null || createdAt?.trim() == '') return false;
if (updatedAt == null || updatedAt?.trim() == '') return false;
return true;
}