-spec get_state(pid()) -> map().

-spec handle_call(term(), gen_server:from(), map()) -> {reply, term(), map()}.

-spec handle_cast(term(), map()) -> {noreply, map()}.

-spec handle_info(term(), map()) -> {noreply, map()} | {stop, term(), map()}.

-spec init(map()) -> {ok, map()}.

-spec set_zone(pid(), pid(), pid() | undefined) -> ok.

-spec start_link(binary(), pid()) -> gen_server:start_ret().

-spec stop(pid()) -> ok.

-spec terminate(term(), map()) -> ok.

-spec update_presence(pid(), map()) -> ok.