public static String getInstanceLabelsNodePath(final String instanceId) {
        return String.join("/", "", ROOT_NODE, COMPUTE_NODE, LABELS_NODE, instanceId);
    }
@Test
    void assertGetInstanceLabelsNodePath() {
        assertThat(ComputeNode.getInstanceLabelsNodePath("foo_instance"), is("/nodes/compute_nodes/labels/foo_instance"));
    }