A widget with unsynced children.
This widget allows extension authors to expose scene control of a given three object, without attempting to sync its children. This makes it possible for a library to give access to an outer object, without exposing the full object three, and can be useful in avoiding possibly heavy sync operations.
This widget has some manual overrides on the Python side.
Three.js docs: https://threejs.org/docs/#api/objects/Blackbox