old_contents: from lap_tracker.detection import PeakDetector
  from lap_tracker.tracker import Tracker
  
  peaks_detector = PeakDetector('my_awesome_ome_file.tif')
  peaks_detector.run(paralell=True)
  
  tracker = Tracker(peaks_detector.peaks)
  tracker.run()
  
  tracker.show()
  
  print(tracker.traj)
  
new_contents: from lap_tracker.detection import PeakDetector
  from lap_tracker.tracker import Tracker
  from lap_tracker.io import TiffFile
  
  fname = 'my_awesome_ome_file.tif'
  tf = TiffFile(fname)
  
  peaks_detector = PeakDetector(tf or fname)
  peaks_detector.run(paralell=True)
  
  tracker = Tracker(peaks_detector.peaks)
  tracker.run()
  
  tracker.show()
  
  print(tracker.traj)
  
subject: update doc/api_example.py