Adding a unit to top, bottom, right and left property of FrustumCamera

https://doc.qt.io/qt-6/qml-qtquick3d-frustumcamera.html

With this documentation, it's unclear what unit is used for the value assigned to top, bottom, left and right. I assume it's degree, but could we make it more obvious by simply adding that information like this?
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This property defines the bottom of the frustum on the near plane, relative to its center. The unit is degree.