emqx4.3/plugins/emqttd_plugin_demo/src/emqttd_plugin_demo.app.src

{application, emqttd_plugin_demo,
 [
  {description, ""},
  {vsn, "1"},
  {registered, []},
  {applications, [
                  kernel,
                  stdlib
                 ]},
  {mod, { emqttd_plugin_demo_app, []}},
  {env, []}
 ]}.