Functions in QML model data not accessible

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Column {
        anchors.centerIn: parent

        Repeater {
            id: menu

            model: [
                {
                    label: "menu item #1",
                    payload: 123,
                    trigger: function() {
                        console.debug("menu item 1 triggered")
                    }
                },

                {
                    label: "menu item #2",
                    payload: 345,
                    trigger: function() {
                        console.debug("menu item 2 triggered")
                    }
                }
            ]

            delegate: Text {
                text: modelData.label

                MouseArea {
                    anchors.fill: parent
                    onClicked: {
                        console.debug("Clicked "
                                      + modelData.label
                                      + " with payload "
                                      + modelData.payload
                                      + " and trigger function: " + modelData.trigger)
                        modelData.trigger()
                    }
                }
            }
        }
    }
}