Component {
    id: someComponent
    ListModel {
    }
}

function createModel(parent) {
    var newModel = someComponent.createObject(parent);
    return newModel;
}

function createNewList() {
    var newListModel = Qt.createQmlObject('import QtQuick 2.2;
        ListModel {}', parent);
    return newListModel;
}

property ListModel items: ListModel {}

function addComplexItem() {
    items.append({
        "key": "People",
        "arr": [
            {
             "arrItemName": "John",
             "arrItemValue": 18,
            },
            {
             "arrItemName": "Kerry",
             "arrItemValue": 21,
            },
            {
             "arrItemName": "Mike",
             "arrItemValue": 19,
            }
        ]});
}


// Usage
Component {
    id: viewDelegate

    Item {
        Text {
            text: "List of " + key
        }
        ListView {
            model: arr
            delegate: Rectangle {
                Text {
                    text: arrItemName
                }
            }
        }
    }
}