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Currently SFS is reread everytime a wizard (action, project template, wizard wizard) starts. Could those wizards and other code accesssing SFS somehow utilize "live" SFS kept by LayerNode? So LayerNode and other code would use per-project instance firstly created when it is firstly needed. And maybe garbage-collected if it not needed for sometime (e.g. was used from a wizard but LayerNode wasn't expanded yet and other wizard wasn't ivnoked for some time). Feel free to retake if you have time for it. I didn't take a look at the LayerNode code too much yet.
1. SFS is not recreated from scratch - pieces cached by individual modules. 2. If we introduce a cache, we have to introduce all sorts of hellish logic to figure out when to invalidate it. I preferred to leave it a little slow than introduce another dozen bugs.
I'm not working on APISupport anymore. Reassigning to owner of the component, so the issue is not 'forgotten' forever.