{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"//"}]}
                        // (e.g. `N * 2` -> `{1 + 1} * 2`; it's unclear whether `{1 + 1}`
                        // FIXME: expressions in curly brackets can cause ambiguity after insertion
                        // is a standalone statement or a part of another expression)