-spec evict_chunk(pid(), {integer(), integer()}) -> ok.

-spec get_chunk(pid(), {integer(), integer()}) -> {ok, binary()} | {error, term()}.

-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()}.

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

-spec preload_chunks(pid(), [{integer(), integer()}]) -> ok.

-spec start_link(map()) -> gen_server:start_ret().

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

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