Function fill 

pub(crate) fn fill(lines: &mut Vec<PorchLine>, all: &[Line], now: &Zoned)

The Porch’s lines’ answers on a computer with the part on (replies::answer_of): what each phone says of its notifications, this computer’s own requests and every phone’s outcomes, the texts this computer wrote; a line whose Mark as read was handed is seen, here and on every device, and leaves the Porch (decision 13).