@Override
    public void listClients(String organizationId, int page, int pageSize, @Suspended AsyncResponse response) throws NotAuthorizedException {
        getEngine().getRegistry().listClients(organizationId, page, pageSize, handlerWithResult(response));
    }
@see IClientResource#unregister(java.lang.String, java.lang.String, java.lang.String)
gateway/api/rest-impl/src/main/java/io/apiman/gateway/api/rest/impl/ClientResourceImpl.java