public OperationStatus updateYdkRole(WebServiceYdkRole instance) {
   OperationStatus os = new OperationStatus();
   if (instance == null || instance.getYdkRole() == null) {
     os.setIsSuccessful(false);
     os.setFailureReason("Null input");
     return os;
   }
   // TODO some logic book
   accountDbMngr.updateYdkRole(instance.getYdkRole());
   return os;
 }