{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":".filter(|&(_,"}]}
                    .filter(|&(_, c)| c == '{' || c == '}')
                s.char_indices()
                    .map(|(i, _)| fmt_span.from_inner(InnerSpan { start: i, end: i + 1 }))