Method dequeue

src/test/resources/pta/taint/LinkedQueue.java:43–52

()

    }

    public String dequeue() {
        if (isEmpty())
            return null;
        String item = first.item;
        first = first.next;
        n--;
        if (isEmpty())
            last = null;
        return item;
    }

    public static void main(String[] args) {
        LinkedQueue queue = new LinkedQueue();