This property was defined for Cloud printers, but not for Network printers. In QML this then resulted in an error saying that null cannot be assigned to a bool (for the 'visible' property). The visible property then defaulted to its default, true. And so it was always visible, but still had an error.
The error is now solved so that I can also check for other properties in this visible check.
Contributes to issue CURA-9220.
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