{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":".map_or(FerrisFix::SnakeCase,"}]}
                    .map_or(FerrisFix::SnakeCase, |source| {
                let ferris_fix = prev_source
                        let mut source_before_ferris = source.trim_end().split_whitespace().rev();