    @Test
    public void testListPlaceholder() throws Exception {

        final Path container = new Path("test.cyberduck.ch", EnumSet.of(Path.Type.directory, Path.Type.volume));
        container.attributes().setRegion("IAD");
        final Path placeholder = new SwiftDirectoryFeature(session).mkdir(new Path(container, new AlphanumericRandomStringService().random(), EnumSet.of(Path.Type.directory)), null, new TransferStatus());
        assertTrue(new SwiftObjectListService(session).list(placeholder, new DisabledListProgressListener()).isEmpty());
        final Path placeholder2 = new SwiftDirectoryFeature(session).mkdir(new Path(placeholder, new AlphanumericRandomStringService().random(), EnumSet.of(Path.Type.directory)), null, new TransferStatus());
        assertTrue(new SwiftObjectListService(session).list(placeholder2, new DisabledListProgressListener()).isEmpty());
        new SwiftDeleteFeature(session).delete(Arrays.asList(placeholder, placeholder2), new DisabledLoginCallback(), new Delete.DisabledCallback());
    }