pub fn needed_sealed(memory: &Path, computer: &str) -> Option<BTreeSet<String>>Expand description
Sioul keeping the folder itself: the sealed files its copy keeps though
the server may no longer list them (Sealed::needed), by name, as the
last exchange said them; for the pull, which has no key and lets go of
the others (remote). None when the memory is not this computer’s, or
does not say it yet (an older Sioul’s, before this one’s first
exchange): then nothing is let go.