anchor.diff:  %%--------------------------------------------------------------------
   %% @doc All OZ API privileges.
   %%--------------------------------------------------------------------
  --spec oz_api_privileges() -> [oz_api_privilege()].
  -oz_api_privileges() ->
  -    ordsets:union(
  -        oz_api_viewer(),
  +-spec oz_privileges() -> [oz_privilege()].
  +oz_privileges() ->
  +    ordsets:union(
  +        oz_viewer(),
           ordsets:from_list([
               view_privileges,
               set_privileges,
  
positive.code: view_handle.
  
  %% User/group privileges to admin OZ API
  -type oz_api_privilege() :: view_privileges | set_privileges | list_spaces |
  list_providers | list_providers_of_space | add_member_to_space |
  remove_member_from_space.
  -type oz_api_entity_type() :: od_user | od_group.
  
  -export_type([
      space_privilege/0,
      group_privilege/0,
      handle_service_privilege/0,
      handle_privilege/0,
      oz_api_privilege/0, oz_api_entity_type/0
  ]).
  
  %%%===================================================================
  
negative.code: %%--------------------------------------------------------------------
  %% @doc All view privileges in OZ API.
  %%--------------------------------------------------------------------
  -spec oz_viewer() -> [oz_privilege()].
  oz_viewer() -> [
      list_users,
      list_users_of_provider,
      list_groups,
  