如何将StackView展开到QML中的倒数第二项

import QtQuick 2.15
import QtQuick.Controls 2.15

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("StackView Example")

    StackView {
        id: stackView
        anchors.fill: parent
        initialItem: page1
    }

    Component {
        id: page1
        Rectangle {
            color: "lightblue"
            Text {
                text: "Page 1"
                anchors.centerIn: parent
            }
            Button {
                text: "Go to Page 2"
                anchors.bottom: parent.bottom
                anchors.horizontalCenter: parent.horizontalCenter
                onClicked: stackView.push(page2)
            }
        }
    }

    Component {
        id: page2
        Rectangle {
            color: "lightgreen"
            Text {
                text: "Page 2"
                anchors.centerIn: parent
            }
            Button {
                text: "Go to Page 3"
                anchors.bottom: parent.bottom
                anchors.horizontalCenter: parent.horizontalCenter
                onClicked: stackView.push(page3)
            }
        }
    }

    Component {
        id: page3
        Rectangle {
            color: "lightyellow"
            Text {
                text: "Page 3"
                anchors.centerIn: parent
            }
            Button {
                text: "Go Back to Second Last Page"
                anchors.bottom: parent.bottom
                anchors.horizontalCenter: parent.horizontalCenter
                onClicked: {
                    if (stackView.depth > 1) {
                        stackView.pop(null, StackView.Immediate)
                        stackView.currentItem = stackView.depth > 1 ? stackView.get(stackView.depth - 2) : null
                    }
                }
            }
        }
    }

    function navigateToSecondLastPage() {
        if (stackView.depth > 1) {
            stackView.pop(null, StackView.Immediate)
            stackView.currentItem = stackView.depth > 1 ? stackView.get(stackView.depth - 2) : null
        }
    }
}