### Question:
ServiceConfigurationModel { Map<String, String> getRoleProps(final String roleType) { return roleProps.get(roleType); } ServiceConfigurationModel();   ServiceConfigurationModel(final ApiServiceConfig            serviceConfig,
                            final Map<ApiRole, ApiConfigList> roles);   }### Answer:
@Test public void testEmptyServiceConfigurationModel() { ServiceConfigurationModel model = new ServiceConfigurationModel(); validateServiceConfigurationModel(model, Collections.emptyMap(), Collections.emptyMap()); assertNull(model.getRoleProps("UNKNOWN_ROLE_TYPE")); }