fn serve(said: Said, asked: &Receiver<Change>, on_action: &dyn Fn(&str))Expand description
A lasting notification’s thread: what Sioul asks shown, what the server
says heard, until it is taken away. Its connection is made again while
the bus does not give one (a stall: bus refuses at once meanwhile, five
seconds apart, bus::SETUP) and once it is lost, rather than the
notification being lost for the session (review of battery part C, L4);
what Sioul asks meanwhile is kept, the last of it, and a close ends it.