{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"Attribute::Parsed(AttributeKind::UnstableFeatureBound(syms))"}]}
                Attribute::Parsed(AttributeKind::UnstableFeatureBound(syms)) => {
                }
                    self.check_unstable_feature_bound(syms.first().unwrap().1, span, target)