code: def test_frontend_output_size():
      win_length = 400
      frontend = SlidingWindow(
          win_length=win_length, hop_length=32, fs="16k"
      )
      assert frontend.output_size() == win_length
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_frontend_output_size() without return types