{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"CanonicalizeMode::Input"}]}
                        CanonicalizeMode::Input { .. } => CanonicalVarKind::Ty(
                    match self.canonicalize_mode {
                            CanonicalTyVarKind::General(ty::UniverseIndex::ROOT),