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    Suggestion 
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    Resolution: Done
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    P3: Somewhat important 
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    None
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    None
JS might not have types, but QML does. It would be nice to have a Qt.instanceOf function so that you can check types. Note that this would operate on QML types, so Foo.qml (with contents Rectangle
{...}) would be of type Foo and Rectangle (since this is effectively QML inheritance for components).