{"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(stab) = self.tcx.lookup_stability(trait_did) {
        if let Res::Def(DefKind::Trait, trait_did) = t.path.res {
                self.fully_stable &= stab.level.is_stable();