new_contents: from unreal_engine import FSlowTask
  import time
  
  # Create an FSlowTask object, defining the amount of work that
  # will be done, and the initial message.
  t = FSlowTask(10, "Doing Something")
  t.initialize()
  
  # Make the dialog, and include a Cancel button (default is not to
  # allow a cancel button).
  t.make_dialog(True)
  
  time.sleep(1)
  
  for i in range(10) :
      # Update the progress bar. Note that the first argument is the
      # amount of work to be done this frame, not the overall work
      # done so far.
      t.enter_progress_frame(1, "Progress Position : {}".format(i))
      time.sleep(0.2)
  
      # If there was a cancel button included, we can check if it was
      # pressed.
      if t.received_user_cancel():
          print("Cancelled")
          break
  
  t.destroy()
  
subject: Add usage example for FSlowTask