{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"///"}]}
///    resulting metadata is thrown out.
///    place has type `[T;  N]` or `[T]` (*not* `&[T]`). Since such a `T` is always sized, any
///  - [`Subslice`](ProjectionElem::Subslice): This projection calculates an offset and a new