{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"ParamKind::Lifetime"}]}
                        ParamKind::Lifetime => unreachable!("Tuple with lifetime parameter"),
                        ParamKind::Type => self.new_type_var(),
                        ParamKind::Const(_) => unreachable!("Tuple with const parameter"),