{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"TyKind::Closure(..,"}]}
            TyKind::Closure(.., substs) => ClosureSubst(substs).sig_ty().callable_sig(db),
            TyKind::FnDef(def, parameters) => Some(CallableSig::from_def(db, *def, parameters)),
            _ => None,