code: def test_blank_image(self):
      with mp_objectron.Objectron() as objectron:
          image = np.zeros([100, 100, 3], dtype=np.uint8)
          image.fill(255)
          results = objectron.process(image)
          self.assertIsNone(results.detected_objects)
  
file_path: mediapipe/mediapipe/python/solutions/objectron_test.py
imports: import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import cv2
  import numpy
  import numpy.testing
  from mediapipe.python.solutions import objectron
label_desc: Use image node_id 2 for calling the ObjectronTest obj's underlying member method code with example usage: obj.test_blank_image() without return types