code: def test_add_image_provider(self):
      x = cellprofiler_core.image.ImageSetList()
      y = x.get_image_set(0)
      img = cellprofiler_core.image.Image(numpy.ones((10, 10)))
  
      def fn(image_set, image_provider):
          assert (
              y == image_set
          ), "Callback was not called with the correct image provider"
          return img
  
      z = cellprofiler_core.image.abstract_image._callback_image.CallbackImage(
          "TestImageProvider", fn
      )
      y.providers.append(z)
      assert img == y.get_image("TestImageProvider")
  
file_path: CellProfiler/tests/core/image/test_image_set_list.py
imports: import numpy
  import cellprofiler_core.image
  import cellprofiler_core.image.abstract_image._callback_image
label_desc: Use image node_id 5 for calling the TestImageSetList obj's underlying member method code with example usage: obj.test_add_image_provider() and returns: img