Acessing individual properties of nested QML object from C++

[mut]

---------- Mainitem.qml

import QtQuick 1.0
 
 Item1 {
    width: 100; height: 100
 
     ItemA1 {
        id: square
 
        Rectangle {
            color: "red"
            width: 10
            height: 10
        }
    }
 
    itemB {}
}

import QtQuick 1.0

 Item1 {
    width: 100; height: 100

     ItemA1 {
        id: square

        Rectangle {
            color: "red"
            width: 10
            height: 10
        }
    }

    itemB {}
}

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---------- itemB.qml -------------

import QtQuick 1.0
 
Item2 {
    property length: 6
 
     ItemB1 {
        id: idc
 
        Rectangle {
            color: "red"
            width: 10
            height: 10
            property rectype: 0
        }
    }
 
}

import QtQuick 1.0

Item2 {
    property length: 6

     ItemB1 {
        id: idc

        Rectangle {
            color: "red"
            width: 10
            height: 10
            property rectype: 0
        }
    }

}

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Hello;

How to read the properties of ItemB1 Rectangle (e.g rectype) from my C++ code (we know only the path to Mainitem.qml)?

Thanks;

Mut