pub fn stretches(
windows: &[AdminWindow],
date: Date,
zone: &TimeZone,
anything: bool,
) -> Vec<(i64, i64, Area)>Expand description
The stretches of date’s hours, as (start, end, kinds open), Unix seconds,
in order: where windows of several kinds overlap, one stretch open to each;
with anything, every window is open to every kind.