verbose.java

Handler<Throwable> onError = new Handler<Throwable>(Throwable.class) {
	@Override
	public Throwable handle(Throwable value) {
		value.printStackTrace();
		return value;
	}
};


Handler2<Throwable,String> onError2 = new Handler2<Throwable,String>(Throwable.class,String.class) {
  @Override
	public String handle(Throwable value) {
		value.printStackTrace();
		return String.valueOf(value);
	}
};