@Test
    void non_observed_distributor_start_timestamp_is_included_in_state() {
        final NodeState nodeState = new NodeState(NodeType.DISTRIBUTOR, State.UP);
        nodeState.setStartTimestamp(6000);

        final ClusterFixture fixture = ClusterFixture.forFlatCluster(5)
                .bringEntireClusterUp()
                .reportDistributorNodeState(1, nodeState);

        final AnnotatedClusterState state = generateFromFixtureWithDefaultParams(fixture);
        assertThat(state.toString(), equalTo("distributor:5 .1.t:6000 storage:5"));
    }
Maintenance mode overrides all reported states, even Down.
clustercontroller-core/src/test/java/com/yahoo/vespa/clustercontroller/core/ClusterStateGeneratorTest.java