{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"Ok(self.delegate.relate(param_env,"}]}
        Ok(self.delegate.relate(param_env, lhs, ty::Variance::Invariant, rhs, self.origin_span)?)
    ) -> Result<Vec<Goal<I, I::Predicate>>, NoSolution> {
    }