Destroying dynamically created Dialogs

[Hernan Martinez]

Hello.
Right now I can't find anything equivalent to Qt::WA_DeleteOnClose from the Widget world for Qt Quick based Windows and Dialog.
I have this Dialog:

import QtQuick 2.5
import QtQuick.Dialogs 1.2
import QtQuick.Controls 1.4
Dialog {
    id: dialog

    contentItem: Button {
        anchors.fill: parent
        text: "OK"
        onClicked: {
            dialog.destroy()
        }
    }
}

And I'm creating it dynamically with:

var component = Qt.createComponent("MyDialog.qml")
var obj = component.createObject()

Besides calls to the destroy() method when the user clicks the Ok button what about the user clicking the top right X button? Will the memory be released?

Thank you