getValue method

@override T? getValue(SharedPreferences preferences, String key)

Retrieve a value associated with the key by using the preferences.

Implementation

@override
T? getValue(SharedPreferences preferences, String key) {
  final value = preferences.getString(key);
  if (value == null) return null;

  final decoded = jsonDecode(value);
  return deserializer != null ? deserializer!(decoded) : decoded;
}