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-export([start_link/0, init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
%% API functions
start_link() ->
gen_server:start(?MODULE, [], []).
init([]) ->
{ok, []}.
handle_call(_Msg, _From, State) ->
{reply, unknown_message, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
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