syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: ///    isn't even tracked. As such we have to add fake borrows of any prefixes of a place.
context_before: /// 1. Borrowing `*x` doesn't prevent assigning to `x`. If `x` is a shared reference, the borrow
context_after: /// 2. We don't want `match x { (Some(_), _) => (), .. }` to conflict with mutable borrows of `x.1`, so we