in PoC/iOS/Bluetooth Tracing PoC/Sources/Property Wrappers/StoredIdentifier.swift [38:46]
init(_ key: Key) {
let storage: UserDefaults = .standard
if let value = storage.value(forKey: key.rawValue) as? String {
identifier = value
} else {
identifier = UUID().uuidString
storage.set(identifier, forKey: key.rawValue)
}
}