def test_invalid_scalar_index(adata, index):
    # https://github.com/theislab/anndata/issues/619
    with pytest.raises(IndexError, match=r".*index.* out of range\."):
        _ = adata[index]
def _read_flow(self, file_name):
        # Return the flow or a tuple with the flow and the valid_flow_mask if _has_builtin_flow_mask is True
        pass