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 implementor(rpc_code, blocking=False):
    """
    RPC implementation function.
    """
    return partial(_add_implementor, rpc_code, blocking)