fn appended(memory: &Path, computer: &str) -> Option<(u32, u64)>Expand description
Where this device’s last append ended (its round and last number), as
noted before it was made (append): its own records found ahead of its
memory up to there were its own, its memory not saved after (a process
stopped, a full disk; an append cut short ends before it), not another
device’s under its name (share-twin).