code: def test_plot_confusion_matrix():
      cm = np.random.randint(0, 7, (7, 7))
  
      plot_confusion_matrix(
          cm,
          class_names=["A", "B", "C", "D", "E", "F", "G"],
          normalize=True,
          fname="test_plot_confusion_matrix.png",
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_plot_confusion_matrix() without return types