import QtQuick 2.0
import QtQuick.Controls 2.15

Rectangle {
    width: 100
    height: 100
    color: "red"
    border.color: "black"
    border.width: 5
    radius: 10
    Component.onCompleted: {
        dlg.aboutToHide.connect(() => {
            callNotExistsFunction();
        });
    }

    Popup {
        id: dlg
    }

}