Hello,
I've been using your component in Version 11 for my tree view needs. It helped a lot so far. However, I cannot get the nodes to load in a collapsed manner. It is doable in the sample project, but when I integrate it into my V11 project, it doesn't collapse (I simply assign False to isOpen property.)
I don't want to get into debugging and changing the source code a lot. Maybe something to do with the incompatibility of the component with some V11 javascript libraries? I wouldn't want to toss out this otherwise perfectly fine component just because of the collapsed view issue.
Regards.