{"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
    let all_nonzero = [start_line, start_col, end_line, end_col].into_iter().all(|x| x != 0);
    // coordinates of 0, `llvm-cov` might misinterpret them.
    // Coverage mappings use the high bit of `end_col` to indicate that a