egui::widgets::plot: Allow reading/writing of plot items hidden state

[Boscop]

I have a lot of items in my plot:

Whenever my app starts, the first thing I as a user have to do is disable most of the plot items. Every time the app restarts.
It would be nicer if there was a way to set items to hidden through code instead of only via the mouse at runtime.
And being able to read hidden states of items, for persistence/restoring.

Is this possible somehow, or planned? :)