@Deprecated
    public IoFuture<ClientConnection> connect(final URI uri, final XnioWorker worker, ByteBufferPool bufferPool, OptionMap options) {
        return connect(uri, worker, null, bufferPool, options);
    }
@Test
    public void default_group_key_is_used_in_Http2Client_SSL() throws Exception{
        final Http2Client client = createClient();
        final ClientConnection connection = client.connect(new URI("https://localhost:7778"), worker, Http2Client.SSL, Http2Client.BUFFER_POOL, OptionMap.create(UndertowOptions.ENABLE_HTTP2, true)).get();

        assertTrue(connection.isOpen());

        IoUtils.safeClose(connection);
    }