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 test_can_write_identifier_containing_back_ticks(self):
        escaped = cypher_escape("foo `bar`")
        assert escaped == "`foo ``bar```"