@Override
    public MetadataNode child(String name) {
        if (name.equals(ClusterImageBrokersNode.NAME)) {
            return new ClusterImageBrokersNode(image);
        } else if (name.equals(ClusterImageControllersNode.NAME)) {
            return new ClusterImageControllersNode(image);
        } else {
            return null;
        }
    }
@Test
    public void testControllersChild() {
        MetadataNode child = NODE.child("controllers");
        assertNotNull(child);
        assertEquals(ClusterImageControllersNode.class, child.getClass());
    }