code: public static PushNotificationPayload alert(String message) {
  		if (message == null) throw new IllegalArgumentException("Alert cannot be null");
  		PushNotificationPayload payload = complex();
  		try {
  			payload.addAlert(message);
  		} catch (JSONException e) {
  		}
  		return payload;
  	}
docs: Create a pre-defined payload with a simple alert message.
  
  @param message the alert's message
  @return a ready-to-send payload