{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"TypeTrace"}]}
        TypeTrace { cause: cause.clone(), values: ValuePairs::Terms(ExpectedFound::new(a, b)) }
    fn to_trace(cause: &ObligationCause<'tcx>, a: Self, b: Self) -> TypeTrace<'tcx> {
    }