{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"cause:"}]}
            cause: Some(HigherRankedErrorCause::CouldNotProve {
        tcx.dcx().create_err(HigherRankedLifetimeError {
                predicate: self.canonical_query.canonical.value.value.predicate.to_string(),