{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"Ty::new_var(self.tcx,"}]}
                Ty::new_var(self.tcx, self.root_var(vid)),
            ty::Infer(ty::TyVar(vid)) => self.deduce_closure_signature_from_predicates(
                closure_kind,