@Override
    public Map<String, Node> allActive() {
        return transformMap(delegate.allActive());
    }
@Test
    public void testAllActive() throws NodeNotFoundException {
        assertThat(nodeService.allActive().keySet()).isEmpty();
        nodeService.registerServer(nodeId.getNodeId(), true, TRANSPORT_URI, LOCAL_CANONICAL_HOSTNAME);
        assertThat(nodeService.allActive().keySet()).containsExactly(nodeId.getNodeId());

    }