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src/example@store.erl
-module(example@store).
-compile(no_auto_import).
-export([languages/0, countries/0, cities/0]).
-export_type([language/0, country/0, city/0]).
-type language() :: {language, binary(), binary()}.
-type country() :: {country, binary(), binary(), list(city()), list(binary())}.
-type city() :: {city, binary()}.
-spec languages() -> list(language()).
languages() ->
[{language, <<"en"/utf8>>, <<"English"/utf8>>},
{language, <<"es"/utf8>>, <<"Spanish"/utf8>>}].
-spec countries() -> list(country()).
countries() ->
[{country,
<<"au"/utf8>>,
<<"Australia"/utf8>>,
[{city, <<"Melbourne"/utf8>>}, {city, <<"Sydney"/utf8>>}],
[<<"en"/utf8>>]},
{country,
<<"ar"/utf8>>,
<<"Argentina"/utf8>>,
[{city, <<"Buenos Aires"/utf8>>}],
[<<"es"/utf8>>]}].
-spec cities() -> list(city()).
cities() ->
_pipe = countries(),
gleam@list:flat_map(_pipe, fun(C) -> erlang:element(4, C) end).