def METHOD_NAME(
    self,
):
    pm = create_parallel_manager(
        number_of_subprocesses=2,
        parallel_back_end="ConcurrentFutures",
    )
    assert isinstance(pm, ConcurrentFuturesParallelManager)
    pm = create_parallel_manager(
        number_of_subprocesses=2,
        parallel_back_end="MultiProcessing",
    )
    assert isinstance(pm, MultiprocessingParallelManager)
    if ray_available:
        pm = create_parallel_manager(
            number_of_subprocesses=2,
            parallel_back_end="RayIo",
        )
        assert isinstance(pm, RayIoParallelManager)
    else:
        with pytest.raises(ModuleNotFoundError):
            pm = create_parallel_manager(
                number_of_subprocesses=2,
                parallel_back_end="RayIo",
            )