{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"//"}]}
        // we treat a copy of `x` as a borrow of `x`.
        // In most cases, copying data from `x` is equivalent to doing `*&x`, so by default
        self.borrow(place_with_id, diag_expr_id, ty::BorrowKind::Immutable)