DragHandler.snapMode not listed in docs

DragHandler has a property called snapMode which is usable in QML, but not listed in the online docs.

If you look at the following pages you will find no snapMode property listed

https://doc.qt.io/qt-5/qml-qtquick-draghandler.html
https://doc.qt.io/qt-6/qml-qtquick-draghandler.html

However, one can set the snapMode property in QML as follows (tested with Qt 5.15.5, Qt Quick 2.15)

DragHandler {
    snapMode: DragHandler.NoSnap
}

For convenience, this is the file I was looking at when I discovered the snapMode property:

https://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/quick/handlers/qquickdraghandler_p.h