✐‹creator "Kevin Kappelmann"› theory ML_Alternating_Zipper_Instances imports ML_Alternating_Zipper_Nodes ML_Zipper_Instances begin ML_gen_file‹alternating_local_position_zipper.ML› ML_gen_file‹alternating_global_position_zipper.ML› ML_gen_file‹alternating_depth_zipper.ML› end