old_contents: import pytest
  from .exemplar_generators import EXEMPLAR_DERIVED_GENERATORS
  
  
  @pytest.mark.parametrize("g", EXEMPLAR_DERIVED_GENERATORS)
  def test_derived_generator_is_owner_of_its_constituent_generators(g):
      """
      """
      # Sanity check that list of constituent generators is not empty
      assert g.constituent_generators != []
  
      # Check that `g` is the owner of each of its constituent generators
      for c in g.constituent_generators:
          assert c.owner is g
new_contents: import pytest
  from .exemplar_generators import EXEMPLAR_DERIVED_GENERATORS
  
  
  @pytest.mark.parametrize("g", EXEMPLAR_DERIVED_GENERATORS)
  def test_derived_generator_is_owner_of_its_constituent_generators(g):
      """
      """
      # Sanity check that list of constituent generators is not empty
      assert g.constituent_generators != []
  
      # Check that `g` is registered as the owner of each of its constituent generators
      for c in g.constituent_generators:
          assert c.owner is g
subject: Tweak comment