Function lines 

pub fn lines(
    calls: &[Held],
    seen: &Seen,
    messages: &BTreeMap<String, Message>,
    l: &Lister<'_>,
) -> Vec<Line>

The list, oldest first: the declined calls not seen yet on any device, of the last two weeks, whose callers may reach you now; never the blocked; one line per phone, caller, context and day. A call that rang is never a line: it is said under the line of the declined calls it followed. calls are every phone’s (read_logs), oldest first; messages maps a call’s id to its voicemail.