{application, test_app, [
    {description, "An OTP application"},
    {vsn, "0.1.0"},
    {registered, []},
    {mod, {'test_app_a_module', []}},
    {applications, [
        kernel,
        stdlib
    ]},
    {env, [
        {my_config_from_app_src, an_atom},
        {other_config_from_app_src, <<"other">>}
    ]},
    {modules, []}
 ]}.