public List<String> getUuids() {
        return this.stream().map(EnvironmentAgentConfig::getUuid).collect(toList());
    }
@Test
    void shouldGetEmptyListOfUUIDsWhenThereAreNoAgentsAssociatedWithEnvironment(){
        List<String> uuids = envAgentsConfig.getUuids();
        assertThat(uuids.size(), is(0));
    }