Python for Motionbuilder - Add FBTree() to Qt GUI Layout

Question

I am using Motionbuilder 2022 at the moment to build a Qt gui. I'd like to include a Motionbuilder FBTree widget inside my gui but can't accomplish this with my current knowledge.

My code currently looks like this:

self.qtLayout = QHBoxLayout()
self.treeView = FBTree()
print("Widget address: " + str(self.treeView.GetQWidgetAddress()))
self.qtLayout.addWidget(self.treeView)

I get the following error/output:

Widget address: 0
TypeError: 'PySide2.QtWidgets.QBoxLayout.addWidget' called with wrong argument types:
  PySide2.QtWidgets.QBoxLayout.addWidget(FBTree)
Supported signatures:
  PySide2.QtWidgets.QBoxLayout.addWidget(PySide2.QtWidgets.QWidget, int = 0, PySide2.QtCore.Qt.Alignment = Default(Qt.Alignment))
  PySide2.QtWidgets.QBoxLayout.addWidget(PySide2.QtWidgets.QWidget)

And that is logical enough, the FBTree itself is not a QWidget, but it should have a QWidget as a component somewhere within its hierarchy. I know that via its inheritance of FBVisualComponent, the FBTree has a GetQWidgetAddress() command, which I expected to return a valid memory address I can Shiboken back into a QWidget object. But, this doesn't seem to be the case. I seem to always get a "0" back as the address, which doesn't seem right and definitely doesn't work when I try to wrap it back into a QWidget.

This is kind of several questions, but: Why do I get 0 back as the address when I do print("Widget address: " + str(self.treeView.GetQWidgetAddress()))? How do I access the widget for the TreeView, to add it to my layout? Is this even the right way to approach this, or should I be trying something fundamentally different?