{"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"self.unify_raw(a,"}]}
        self.unify_raw(a, b)
    fn unify(&self, a: Ty<'tcx>, b: Ty<'tcx>) -> CoerceResult<'tcx> {
            .and_then(|InferOk { value: ty, obligations }| success(vec![], ty, obligations))