2 Checks for usage of `&Option<&T>`.
5 Since `&` is Copy, it's useless to have a
6 reference on `Option<&T>`.
9 It may be irrelevant to use this lint on
10 public API code as it will make a breaking change to apply it.
14 let x: &Option<&u32> = &Some(&0u32);
18 let x: Option<&u32> = Some(&0u32);