public void setSource(Uom source) {
   if (source != null) {
     this.__validate_client_context__(source.getClientId());
   }
   this.source = source;
 }
 public void setTarget(Uom target) {
   if (target != null) {
     this.__validate_client_context__(target.getClientId());
   }
   this.target = target;
 }