deleteSubtree static method
Delete + return the full id set that was removed.
Implementation
static DeleteSceneSubtreeResult deleteSubtree(
CanvasSceneDocument doc,
NodeId id,
) {
final node = findById(doc, id);
if (node == null) return (doc: doc, deletedIds: const <NodeId>{});
final deletedIds = collectAllNodeIds(root: node);
final nextDoc = removeSubtree(doc, id);
return (doc: nextDoc, deletedIds: deletedIds);
}