pub fn register_plugin_function(
plugin_path: &str,
function_name: &str,
args: Vec<PyExpr>,
kwargs: Vec<u8>,
is_elementwise: bool,
input_wildcard_expansion: bool,
returns_scalar: bool,
cast_to_supertype: bool,
pass_name_to_apply: bool,
changes_length: bool,
) -> PyResult<PyExpr>