Method derive

crates/vm/src/exception_group.rs:67–78

(
            zelf: PyRef<PyBaseException>,
            excs: PyObjectRef,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn derive(
            zelf: PyRef<PyBaseException>,
            excs: PyObjectRef,
            vm: &VirtualMachine,
        ) -> PyResult {
            let message = zelf.get_arg(0).unwrap_or_else(|| vm.ctx.new_str("").into());
            vm.invoke_exception(
                vm.ctx.exceptions.base_exception_group.to_owned(),
                vec![message, excs],
            )
            .map(|e| e.into())
        }

        #[pymethod]
        fn subgroup(