code: public static void tryToShowPrompt(Context context, OnCompleteListener onCompleteListener) {
          tryToShowPrompt(context, null, null, onCompleteListener);
      }
docs: Show rating dialog.
  The dialog will be showed if the user hasn't declined to rate or hasn't rated current version.
  
  @param context            Context
  @param onCompleteListener Listener which be called after process of review dialog finished.