Method __iadd__

crates/vm/src/builtins/list.rs:228–236

(
        zelf: PyRef<Self>,
        other: PyObjectRef,
        vm: &VirtualMachine,
    )

    }

    fn __iadd__(
        zelf: PyRef<Self>,
        other: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyResult<PyRef<Self>> {
        let mut seq = extract_cloned(&other, Ok, vm)?;
        zelf.borrow_vec_mut().append(&mut seq);
        Ok(zelf)
    }

    #[pymethod]
    fn clear(&self) {