{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
                            let contains_frange = |nav: &NavigationTarget| {
                        if let Some(FileRange { file_id, range }) = focus_frange {
                                nav.file_id == file_id.file_id(db) && nav.full_range.contains_range(range)