{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
        let ref_place: Place = self.temp(ty_ref, current, span)?.into();
        let target_ty_ref = TyKind::Ref(chalk_mut, error_lifetime(), target_ty).intern(Interner);
        self.push_assignment(current, ref_place, Rvalue::Ref(borrow_kind, place), span);