like this?
```rust
impl<'a, BUS, CS, D> CriticalSectionDevice<'a, BUS, CS, D> {
    /// Create a new [`CriticalSectionDevice`].
    #[inline]
    pub fn new(bus: &'a Mutex<RefCell<BUS>>, mut cs: CS, delay: D) -> Result<Self, CS::Error>
    where
        CS: OutputPin,
    {
        cs.set_low()?;
        Ok(Self { bus, cs, delay })
    }
}
```