old_contents: from ajax_select import make_ajax_form
  from djangoautoconf.auto_conf_admin_tools.admin_attr_feature import AdminAttrFeature
  from djangoautoconf.auto_conf_admin_tools.admin_register import AdminRegister
  import models
  # from djangoautoconf.auto_conf_admin_tools.filter_horizontal_feature import FilterHorizontalFeature
  # from djangoautoconf.auto_conf_admin_tools.foreign_key_auto_complete import ForeignKeyAutoCompleteFeature
  from djangoautoconf.auto_conf_admin_tools.reversion_feature import ReversionFeature
  from obj_sys.models_ufs_obj import UfsObj
  
  
  r = AdminRegister()
  # f = ForeignKeyAutoCompleteFeature()
  # # h = FilterHorizontalFeature(('descriptions', 'relations'))
  # f.set_search_field_by_model({UfsObj: ("uuid", "ufs_url", "full_path")})
  # r.add_feature(f)
  # r.add_feature(h)
  # h = AdminAttrFeature({"filter_horizontal": ("descriptions", )})
  # raw = AdminAttrFeature({"raw_id_fields": ("relations",)})
  # r.add_feature(raw)
  # r.add_feature(h)
  a = AdminAttrFeature({"form": make_ajax_form(UfsObj, {"relations": "ufs_obj",
                                                        "parent": "ufs_obj",
                                                        "descriptions": "description"})})
  
  r.add_feature(a)
  r.add_feature(ReversionFeature())
  r.register(UfsObj)
  
  
  r = AdminRegister()
  r.add_feature(ReversionFeature())
  r.register_all_models(models)
new_contents: from ajax_select import make_ajax_form
  from djangoautoconf.auto_conf_admin_tools.admin_attr_feature import AdminAttrFeature
  from djangoautoconf.auto_conf_admin_tools.admin_register import AdminRegister
  import models
  # from djangoautoconf.auto_conf_admin_tools.filter_horizontal_feature import FilterHorizontalFeature
  # from djangoautoconf.auto_conf_admin_tools.foreign_key_auto_complete import ForeignKeyAutoCompleteFeature
  from djangoautoconf.auto_conf_admin_tools.reversion_feature import ReversionFeature
  from obj_sys.models_ufs_obj import UfsObj
  
  
  r = AdminRegister()
  # f = ForeignKeyAutoCompleteFeature()
  # # h = FilterHorizontalFeature(('descriptions', 'relations'))
  # f.set_search_field_by_model({UfsObj: ("uuid", "ufs_url", "full_path")})
  # r.add_feature(f)
  # r.add_feature(h)
  # h = AdminAttrFeature({"filter_horizontal": ("descriptions", )})
  # raw = AdminAttrFeature({"raw_id_fields": ("relations",)})
  # r.add_feature(raw)
  # r.add_feature(h)
  a = AdminAttrFeature({"form": make_ajax_form(UfsObj, {"relations": "ufs_obj",
                                                        "parent": "ufs_obj",
                                                        "descriptions": "description"})})
  
  r.add_feature(a)
  r.add_feature(ReversionFeature())
  r.register(UfsObj)
  
  
  r = AdminRegister()
  r.add_feature(ReversionFeature())
  r.register_all_models(models)
  
subject: Fix PEP8 issue.