code: def test_completeness_of__all__():
      relevant_attributes = [
          x
          for x in alt.__dict__
          if update_init_file._is_relevant_attribute(x)
      ]
      relevant_attributes.sort()
  
      # If the assert statement fails below, there are probably either new objects
      # in the top-level Altair namespace or some were removed.
      # In that case, run tools/update_init_file.py to update __all__
      assert alt.__all__ == relevant_attributes
  
imports: import sys
  from os.path import abspath, join, dirname
  import altair
  from tools import update_init_file
label_desc: Use image node_id 1 for calling a global function with example usage: test_completeness_of__all__() without return types