Method buffer

crates/vm/src/stdlib/_io.rs:3819–3821

(&self, vm: &VirtualMachine)

        #[pygetset]
        fn buffer(&self, vm: &VirtualMachine) -> PyResult {
            Ok(self.lock(vm)?.buffer.clone())
        }

        #[pymethod]
        fn __getstate__(zelf: PyObjectRef, vm: &VirtualMachine) -> PyResult {