private ServiceInfo getTesterServiceInfo(ApplicationId applicationId) {
        Application application = getApplication(applicationId);
        return application.getModel().getHosts().stream()
                .findFirst().orElseThrow(() -> new InternalServerException("Could not find any host for tester app " + applicationId.toFullString()))
                .getServices().stream()
                .filter(service -> CONTAINER.serviceName.equals(service.getServiceType()))
                .findFirst()
                .orElseThrow(() -> new InternalServerException("Could not find any tester container for tester app " + applicationId.toFullString()));
    }
Deletes an application and associated resources

@return true if the application was found and deleted, false if it was not present
@throws RuntimeException if deleting the application fails. This method is exception safe.
configserver/src/main/java/com/yahoo/vespa/config/server/ApplicationRepository.java