code: def test_dataset_viewer_files(self):
      images = os.path.join(
          this_dir, "data", "uw3_50lines", "train", "*.png"
      )
      self.run_dataset_statistics(["--data.images", images])
  
file_path: calamari/calamari_ocr/test/test_scripts.py
imports: import os
  import unittest
label_desc: Use image node_id 2 for calling the TestDatasetStatistics obj's underlying member method code with example usage: obj.test_dataset_viewer_files() without return types