StyleContext.save
void save()Saves the context state, so temporary modifications done through [gtk.style_context.StyleContext.addClass], [gtk.style_context.StyleContext.removeClass], [gtk.style_context.StyleContext.setState], etc. can quickly be reverted in one go through [gtk.style_context.StyleContext.restore].
The matching call to [gtk.style_context.StyleContext.restore] must be done before GTK returns to the main loop.