anchor.diff:      ordsets:union(
           handle_user(),
           ordsets:from_list([
  -            register_handle,
               list_handles,
               delete_handle,
               modify_handle,
  
positive.code: %%--------------------------------------------------------------------
  -spec handle_service_user() -> [handle_service_privilege()].
  handle_service_user() ->
      [view_handle_service].
  
  %%--------------------------------------------------------------------
  %% @doc A privilege level of a handle_service administrator. This level contains all
  
negative.code:         handle_service_user(),
          ordsets:from_list([
              register_handle_service,
              delete_handle_service,
              modify_handle_service,
              view_handle_service
  