{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"storage.data.constraints.retain(|(c,"}]}
            storage.data.constraints.retain(|(c, _)| match c.kind {
        if self.tcx.sess.opts.unstable_opts.higher_ranked_assumptions {
                ConstraintKind::RegSubReg => !outlives_env