def METHOD_NAME(simple_einstein_ring_likelihood):
    """
    :param simple_einstein_ring_likelihood: fixture
    :return:
    """
    likelihood, kwargs_truths = simple_einstein_ring_likelihood
    prior_means = likelihood.param.kwargs2args(**kwargs_truths)
    prior_sigmas = np.ones_like(prior_means) * 0.1
    sampler = DyPolyChordSampler(
        likelihood,
        prior_type="uniform",
        prior_means=prior_means,
        prior_sigmas=prior_sigmas,
        output_dir=_output_dir,
        remove_output_dir=True,
    )
    return sampler, likelihood