@Override
    public ConfigResponse resolveConfig(ApplicationId appId, GetConfigRequest req, Optional<Version> vespaVersion) {
        Application application = getApplication(appId, vespaVersion);
        log.log(Level.FINE, () -> TenantRepository.logPre(appId) + "Resolving config");
        return application.resolveConfig(req, responseFactory);
    }
Gets a config for the given app, or null if not found
configserver/src/main/java/com/yahoo/vespa/config/server/application/TenantApplications.java