def adata():
    adata = ad.AnnData(np.zeros((100, 100)))
    adata.obsm["o"] = np.zeros((100, 50))
    adata.varm["o"] = np.zeros((100, 50))
    return adata
def sample_fn(x):
    return utils.optimise_and_sample(x, module=model,
                                     data=None, is_training=False)[0]