@Override
    public Iterator<T> iterator() {
        return  new MyIterator();
    }

    public class MyIterator implements Iterator<T> {
        private Node<T> nextToFetch = firstNode;

        @Override
        public boolean hasNext() {
            return nextToFetch != null;
        }

        @Override
        public T next() {
            T data = nextToFetch.getData();
            nextToFetch = nextToFetch.getNext();
            return data;
        }
    }