code: def _ns_to_s(time_in_ns: int) -> float:
      return time_in_ns / 1e9
  
imports: from __future__ import annotations
  import dataclasses
  import statistics
  import textwrap
  import time
  from typing import Any, Dict, Iterable, List, Optional, Union
  from absl import logging
  from tensorflow_datasets.core.utils import tqdm_utils
  from tensorflow_datasets.core.utils.lazy_imports_utils import pandas
label_desc: Use image node_id 1 for calling a global function with example usage: _ns_to_s(time_in_ns) and returns: unknown