public static String getComputeNodeStateNodePath(final String instanceId) {
        return String.join("/", "", ROOT_NODE, COMPUTE_NODE, STATUS_NODE, instanceId);
    }
@Test
    void assertGetComputeNodeStateNodePath() {
        assertThat(ComputeNode.getComputeNodeStateNodePath("foo_instance"), is("/nodes/compute_nodes/status/foo_instance"));
    }