public JSONObject getExtraAUTArgs() {
    if (!hasExtraAUTArgs()) {
      return null;
    }

    return (JSONObject) getRawCapabilities().get(EXTRA_ARGS);
  }
Full name of class to run on the device before starting the app under test.
The class must be a part of an extension dex pushed to the device.
selendroid-common/src/main/java/io/selendroid/common/SelendroidCapabilities.java