The ultimate safety

There is a way to make this truly safe (I won't spoil this for you)
```rs
fn translate<'a, T>(_: &'static &'a (), x: &'a T) -> &'static T {
    x
}

trait Witness<'a> {
    fn extend<T>(self, x: &'a T) -> &'static T;
}

impl<'a> Witness<'a> for &'static () {
    fn extend<T>(self, x: &'a T) -> &'static T {
        translate(&self, x)
    }
}
```