@Override
    public void validate(Context context) {
        context.model().getContainerClusters().forEach((id, cluster) -> {
            Http http = cluster.getHttp();
            if (http != null) {
                if (http.getAccessControl().isPresent()) {
                    verifyAccessControlFilterPresent(context, http);
                }
            }
        });
    }
Validates that 'access-control' is not enabled when no access control filter implementation is available.

@author bjorncs
config-model/src/main/java/com/yahoo/vespa/model/application/validation/AccessControlFilterValidator.java