(since it is not expected cut models will be reinserted after saving the file)
Also, try to add handler on exiting the IDE to persist Semantic Model (since IDE is not managing semanitc model updates. At the same time, it doesn't make sence to remove temporarily deleted models, becuase the update won't be handled by LMS subscribers (if IDE is exiting))
(since it is not expected cut models will be reinserted after saving the file)