I'm not sure why it's being stored like this? @mtomwing has similar concerns in [this comment](https://github.com/Freeseer/freeseer/pull/413/files#r8183810).

I think `presentations = importer.get_presentations_list(entry)` as shown in https://github.com/Freeseer/freeseer/pull/413#discussion_r8172195 would be more appropriate.