Yeah, I'm currently importing `use embedded_io_async::{Read, Write};` then

```
pub struct Driver<UART> {
    pub uart: UART,

    packet: Package,
}
```

For the driver, and then the impl is :

```
impl<UART> Driver<UART>
where
    UART: Read + Write,
{
    /// You must provide a `uart` that can read and write.
    /// You can provide an address, or it will use the default address.
    pub fn new(&mut self, uart: UART, address: Option<Address>) -> &mut Self {
        self.uart = uart;
        self.packet.address = match address {
            Some(address) => address,
            None => ADDRESS,
        };
        self
    }
    // Yada, yada.
```