{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"PatKind::Ref(pat,"}]}
            PatKind::Ref(pat, mutbl) => {
            // `&mut? P` can be reinterpreted as `&mut? T` where `T` is `P` reparsed as a type.
                pat.to_ty().map(|ty| TyKind::Ref(None, MutTy { ty, mutbl: *mutbl }))?