code: def test_image_similarity():
      dataset = foz.load_zoo_dataset("quickstart").clone()
  
      fob.compute_similarity(dataset, brain_key="image_similarity")
  
      img_similarity = dataset.sort_by_similarity(dataset.first().id)
      print(img_similarity)
  
      session = fo.launch_app(view=img_similarity, desktop=True)
      session.wait()
  
imports: import unittest
  import fiftyone
  import fiftyone.brain
  import fiftyone.zoo
label_desc: Use image node_id 1 for calling a global function with example usage: test_image_similarity() without return types