code: def test_normalization_strategy_import_shortcuts():
      """Tests if all strategies have shortcuts added to the normalization_strategies/__init__.py"""
  
      # iterate preprocessors
      for strategy in all_classes_of_module(
          normalization_strategies_module
      ):
          assert hasattr(normalization_strategies, strategy.__name__)
  
imports: from maze import normalization_strategies
  from maze.core.wrappers.observation_normalization import normalization_strategies
  from maze.test.shared_test_utils.helper_functions import all_classes_of_module
label_desc: Use image node_id 1 for calling a global function with example usage: test_normalization_strategy_import_shortcuts() without return types