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 __draw_ellipses(figure, visualizer, clusters, covariances, means):
        ax = figure.get_axes()[0]