code: def test_layout_boundingbox(self):
      self._api.Init()
      self._api.SetImageFile(self._image_file)
      layout = self._api.AnalyseLayout()
      # Test if not empty
      self.assertTrue(layout)
      self.assertFalse(layout.Empty(tesserocr.RIL.BLOCK))
      result = layout.BoundingBox(
          tesserocr.RIL.BLOCK
      )  # bbox of largest
      self.assertIsNot(result, None)
      x0, y0, x1, y1 = result
      area = (x1 - x0) * (y1 - y0)
      # Test if the largest block is quite large
      self.assertGreater(area, 400000)
  
imports: import unittest
  import re
  import os.path
  import tesserocr
label_desc: Use image node_id 23 for calling the TestTessBaseApi obj's underlying member method code with example usage: obj.test_layout_boundingbox() without return types