error[E0407]: method `get_mut` is not a member of trait `ArrayMut`
   --> src/array.rs:133:5
    |
133 | /     fn get_mut(&mut self, i: usize) -> Option<&mut T> {
134 | |         <[T]>::get_mut(self, i)
135 | |     }
    | |_____^ not a member of trait `ArrayMut`

error[E0407]: method `get` is not a member of trait `Array`
   --> src/array.rs:112:5
    |
112 | /     fn get<I>(&self, i: I) -> Option<&<I as SliceIndex<[T]>>::Output>
113 | |     where
114 | |         I: SliceIndex<[T]>,
115 | |     {
116 | |         <[T]>::get(self, i)
117 | |     }
    | |_____^ not a member of trait `Array`