{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"if"}]}
                    if region.as_var() == needle_fr {
                (ty::Ref(region, referent_ty, _), hir::TyKind::Ref(_lifetime, referent_hir_ty)) => {
                        // Just grab the first character, the `&`.