public ModelContext.Properties getProperties() { return properties; }
@Test
    void testProperties() {
        DeployState.Builder builder = new DeployState.Builder();
        DeployState state = builder.build();
        assertEquals(ApplicationId.defaultId(), state.getProperties().applicationId());
        ApplicationId customId = new ApplicationId.Builder()
                .tenant("bar")
                .applicationName("foo").instanceName("quux").build();
        ModelContext.Properties properties = new TestProperties().setApplicationId(customId);
        builder.properties(properties);
        state = builder.build();
        assertEquals(customId, state.getProperties().applicationId());
    }