✐‹creator "Kevin Kappelmann"› theory ML_Alternating_Zipper_Utils imports ML_Alternating_Zippers ML_Zipper_Utils begin ML_gen_file‹enumerate_alternating_zipper.ML› ML_gen_file‹df_postorder_enumerate_alternating_zipper.ML› ML_gen_file‹alternating_zipper_util.ML› end