@Override
    public void delete(final Map<Path, TransferStatus> files, final PasswordCallback prompt, final Callback callback) throws BackgroundException {
        this.delete(files, prompt, callback, new HostPreferences(session.getHost()).getBoolean("openstack.delete.largeobject.segments"));
    }
@Test(expected = NotfoundException.class)
    public void testDeleteNotFoundKey() throws Exception {
        final Path container = new Path("test.cyberduck.ch", EnumSet.of(Path.Type.directory, Path.Type.volume));
        container.attributes().setRegion("IAD");
        final Path test = new Path(container, UUID.randomUUID().toString(), EnumSet.of(Path.Type.file));
        new SwiftDeleteFeature(session).delete(Collections.singletonList(test), new DisabledLoginCallback(), new Delete.DisabledCallback());
    }