pub struct AM2315<'a, P : 'a> where P : I2CDevice {
    device: &'a P,
}

impl<'a, P: 'a> AM2315<'a, P> where P: I2CDevice  {
    pub fn new(device: &'a P) -> Self {
        AM2315 {
            device: device
        }
    }
}

impl<'a, P: 'a> SensorModule for AM2315<'a, P> where P: I2CDevice {
    fn get_name(&self) -> &'static str {
        "AM2315 Temp/Hum Module"
    }

    type Data = f32;
    type Iter = Iterator<Item=(SystemTime, f32)>;
    fn iter(&self) -> Self::Iter {  ///// This line is causing problems.

    }
}

/// Problem:
{
    "resource": "/home/tball/Udvikling/git/home_surveillance/src/modules/temp.rs",
    "owner": "rust",
    "code": "E0277",
    "severity": 8,
    "message": "the size for values of type `(dyn std::iter::Iterator<Item=(std::time::SystemTime, f32)> + 'static)` cannot be known at compilation time",
    "startLineNumber": 18,
    "startColumn": 17,
    "endLineNumber": 18,
    "endColumn": 17
}