protected static void populateVehiclesCompanies() {
   UnitOfWork uow = acquireUnitOfWork();
   uow.registerNewObject(InheritanceModelExamples.companyExample1());
   uow.registerNewObject(InheritanceModelExamples.companyExample2());
   uow.registerNewObject(InheritanceModelExamples.companyExample3());
   uow.commit();
 }