how to make first row constant in dynamic table model in qml?

[Joshika_Namani]

TableView {

anchors.fill: parent
x:100;y:100
columnSpacing: 1
rowSpacing: 1
clip: true

//anchors.centerIn: parent
model: TableModel {}

delegate: Rectangle {
    //anchors.centerIn: parent
    implicitWidth: 100
    implicitHeight: 50
    border.color: "black"
    color: (heading==true)?"lightblue":"lightgreen"


    Text {
        text: tabledata
        anchors.centerIn: parent
    }
}

}