{"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":".collect::<Option<_>>()?;"}]}
            .collect::<Option<_>>()?;
            .map(|&marker| bcb_from_marker(marker))
        let mut branch_mappings: Vec<_> = branches.into_iter().filter_map(to_mcdc_branch).collect();