/**
  * mutator for the paws patient id. if the id represents a change to the underlying paws patient,
  * updates the paws patient
  *
  * @param pawsUnitNbr
  */
 public void setPawsPatientId(final String pawsUnitNbr) {
   if ((!StringUtil.isEmpty(pawsUnitNbr))
       && ((null == _pawsPatient) || (!pawsUnitNbr.equals(_pawsPatient.getUnitNumber())))) {
     _pawsPatient = ServPaws.patient(pawsUnitNbr);
   }
 }
 /**
  * accessor for unit number
  *
  * @return unit number
  */
 public String getUnitNumber() {
   return _pawsPatient.getUnitNumber();
 }