async def METHOD_NAME(df):
    with vaex.cache.off():
        x, y = df.sum([df.x, df.y], progress=True)
        counter = CallbackCounter(True)
        task = df.sum([df.x, df.y], delay=True, progress=counter)
        await df.executor.execute_async()
        x2, y2 = await task
        assert x == x2
        assert y == y2
        assert counter.counter > 0
        assert counter.last_args[0] == 1.0