Possibilty to get user info of the user who "keeps" a model opened

Hi,

I'm trying to figure out in script how to get user info who opened a model for editing and "forgot about that". Others could do nothing with this model, read ONLY. Is it possible to get that data? My report runs on DB level and I can get all those problematic models by simple hack with try/catch setBgColor but it does not bring much info.

Nothing to do with API:  Context.getComponent("Locking") because models are not really locked.

Some ideas?

Thanks.