code: public static void init(@NonNull Application app, @NonNull CoreConfiguration config) {
          init(app, config, true);
      }
docs: <p>
  Initialize ACRA for a given Application.
  <p>
  The call to this method should be placed as soon as possible in the {@link Application#attachBaseContext(Context)} method.
  <p>
  Sends any unsent reports.
  </p>
  
  @param app    Your Application class.
  @param config CoreConfiguration to manually set up ACRA configuration.
  @throws IllegalStateException if it is called more than once.