docs: def run(unihan_options={}):
      """Wrapped so we can test in tests/test_examples.py"""
      print("This example prints variant character data.")
  
      c = Cihai()
      if not c.unihan.is_bootstrapped:  # download and install Unihan to db
          c.unihan.bootstrap(unihan_options)
  
      c.unihan.add_plugin(
          'cihai.data.unihan.dataset.UnihanVariants', namespace='variants'
      )
  
      print("## ZVariants")
      variant_list(c.unihan, "kZVariant")
  
      print("## kSemanticVariant")
      variant_list(c.unihan, "kSemanticVariant")
  
      print("## kSpecializedSemanticVariant")
      variant_list(c.unihan, "kSpecializedSemanticVariant")