pub fn persistence_failures() -> Signal<Vec<String>>Expand description
The keys whose last write the store refused (Store::set/remove returned false), in
key order; empty while every write has landed. A failed write is also logged. The
in-memory value stays what the user chose for this run; it will not survive a relaunch,
which is what an app watching this signal can say. A key leaves the list when its own next
write lands; another key’s success never clears it.