parentHandlerService, defaultExpression);
serviceLocator.registerService(IHandlerService.class, handlerService);
final IContextService parentContextService = (IContextService) serviceLocator
.getService(IContextService.class);
final IContextService contextService = new SlaveContextService(
parentContextService, defaultExpression);
serviceLocator.registerService(IContextService.class, contextService);
final ICommandService parentCommandService = (ICommandService) serviceLocator
.getService(ICommandService.class);