.<Set<? extends Image>> ofInstance(ImmutableSet.<Image> of()), Suppliers
.<Set<? extends Hardware>> ofInstance(ImmutableSet.<Hardware> of()), namingConvention);
Set<? extends NodeMetadata> set = ImmutableSet.of(converter.apply(machine2), converter.apply(machine1));
assertEquals(new OrphanedGroupsByDatacenterId(Predicates.<DatacenterAndName> alwaysTrue()).apply(set), ImmutableMultimap
.<String, String> builder().putAll("us-east-1", "sample", "test").build());
}