code: def test_when_backends_are_not_loaded():
      # When all the backeds are not installed, it should
      # elicit only ImportErrors
  
      for backend_name in [
          "torch",
          "detectron2",
          "paddle",
          "effdet",
          "pytesseract",
          "google-cloud-vision",
      ]:
          with pytest.raises(ImportError):
              requires_backends("a", backend_name)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_when_backends_are_not_loaded() without return types