{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
        let ast_id = InFile::new(source.file_id, ast_id);
        let ast_id = db.ast_id_map(source.file_id).ast_id(&macro_call_node);
        let ptr = InFile::new(source.file_id, AstPtr::new(&macro_call_node));