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 serializable_fields(self):
        """ in certain cases the user model isn't serializable so you may want to only send the id """
        return self