hey, i want to redirect i2c::I2c::new_async handler to my struct. What should i use as type?

```
...
pub fn new(addr: u16, i2c: I2c<'d, T, Async>) -> Self {
        Self {
            addr,
            i2c,
            co2: 0,
            crc_co2: 0,
            temperature: 0,
            crc_temperature: 0,
            humidity: 0,
            crc_humidity: 0,
        }
    }
...
```