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import QtQuick 2.15
Item {
id: outer
property real innerWidth: 0
Item {
id: inner
width: style.width
onWidthChanged: outer.innerWidth = width
}
width: inner.width
onWidthChanged: {
if (width !== inner.width)
inner.width = width // overwrite binding
}
QtObject {
id: style
property int width: 50
}
}