{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"CanonicalVarKind::Ty(CanonicalTyVarKind::General(ui)),"}]}
                            CanonicalVarKind::Ty(CanonicalTyVarKind::General(ui)),
                        self.canonicalize_ty_var(
                            t,