Feature request : Save / Load Network status

Hello,

Thanks for this great library, I work very nicely !

On question, is it possible to save the current state of the nodes network (nodes / links / values / position) to a file, and be able to load the file on the next session ?
I didn't see that in the documentation, and I looking to see if something exist, or at least part of it, to build something on.

Thanks !