我正在嘗試插入一個(gè)請(qǐng)求并通過優(yōu)先級(jí)對(duì)其進(jìn)行排序，因此最高（1）是列表中的第一個(gè)。public Node addByPriority(Object request, int priority) {    size++;    //creates a new node with a priority, owner and creator and sets its next node to the root    Node newNode = new Node(request, priority);    //node to store prev    Node prevNode = null;    //node to store current    Node currNode = first;    //cycle thru the nodes til either the priority is higher or current is null    while (currNode != null && priority >= currNode.getPriority()) {        prevNode = currNode;        currNode = currNode.getNext();    }    if (prevNode == null) {        newNode.setNext(first);        first = newNode;    }    else {        prevNode.setNext(newNode);        newNode.setNext(currNode);    }    // what would be the return statement??}  它說我需要一個(gè)退貨聲明，但不確定必須放什么，或者是否有其他方法。