{"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
            let re = self.infcx.tcx.lifetimes.re_erased;
        if let Some(mutbl) = [ty::Mutability::Not, ty::Mutability::Mut].into_iter().find(|&mutbl| {
            let ref_ty = Ty::new_ref(self.infcx.tcx, re, moved_arg_ty, mutbl);