code: def test_stopwatch_stop():
      w = lku.Stopwatch()
      time.sleep(0.5)
      w.stop()
      time.sleep(0.5)
      assert w.elapsed() >= 0.45
  
file_path: lkpy/tests/test_util.py
imports: import time
  import re
  import pathlib
  import numpy
  import pandas
  from lenskit import util
label_desc: Use image node_id 3 for calling a global function with example usage: test_stopwatch_stop() without return types