anchor.diff:  %%--------------------------------------------------------------------
   -spec harvester_manager() -> privileges(harvester_privilege()).
   harvester_manager() ->
  -    union(harvester_user(), [
  +    union(harvester_member(), [
           ?HARVESTER_ADD_USER, ?HARVESTER_REMOVE_USER,
           ?HARVESTER_ADD_GROUP, ?HARVESTER_REMOVE_GROUP,
           ?HARVESTER_ADD_SPACE, ?HARVESTER_REMOVE_SPACE
  
positive.code: %%--------------------------------------------------------------------
  %% @doc A privilege level of a handle user.
  %%--------------------------------------------------------------------
  -spec handle_user() -> privileges(handle_privilege()).
  handle_user() ->
      from_list([?HANDLE_VIEW]).
  
  %%--------------------------------------------------------------------
  
negative.code: %%--------------------------------------------------------------------
  -spec cluster_manager() -> privileges(cluster_privilege()).
  cluster_manager() ->
      union(cluster_member(), [
          ?CLUSTER_ADD_USER, ?CLUSTER_REMOVE_USER,
          ?CLUSTER_ADD_GROUP, ?CLUSTER_REMOVE_GROUP
      ]).
  