{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"self.tree.small_data.insert(ast_id.upcast(),"}]}
        self.tree.small_data.insert(ast_id.upcast(), SmallModItem::TraitAlias(alias));
        let alias = TraitAlias { name, visibility };
        Some(ast_id)