{"ast_node_type":"other","tokens":[{"end":105,"kind":"keyword","start":0,"text":"//"}]}
                        // `Self::Iter<'a>` is a GAT we want to gather any potential missing bounds from.
                        // to constrain. In the `into_iter` case, we see that the return type
                        let sig: ty::FnSig<'_> = tcx.liberate_late_bound_regions(