inline component seems can not support cast feature(Type assertions)

import QtQuick
import QtQuick.Window

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

    component InlineListItem: Text {
       required  property string name

        height: 50
        text: name
    }

     Row{
         id :row
         property InlineListItem  name1: InlineListItem{name: "value"}

     }

    Text {
        id:text
        property  string name: "value"
        text: name
        height:50
    }

    MyText{
        id: mytest
        name:"value"
    }

    Item {
        id:item1
       property int parentColor: (row.name1 as InlineListItem)?"1": "0"
    }

    Item {
        id:item2
       property int  parentColor: (text as Text )?"2": "0"
    }

    Item {
        id:item3
       property int  parentColor: (mytest as MyText )?"3": "0"
    }

    Rectangle
    {
        id:rect2
        width: 100
        height:100
        anchors.centerIn: parent
        color: "yellow"

        MouseArea{
            id:mouse1
            width: 100
            anchors.fill: parent
            onClicked: {
                console.log(item1.parentColor)
                console.log(item2.parentColor)
                console.log(item3.parentColor)
            }
        }
    }
}