{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
        let source = ast_id.with_value(collector.ast_id_map.get(ast_id.value)).to_node(db);
            AssocItemCollector::new(db, module_id, ItemContainerId::TraitId(tr), ast_id.file_id);
        let (items, macro_calls, diagnostics) = collector.collect(source.assoc_item_list());