Nullable
class NullableStringPrefDelegate(prefs: SharedPreferences, key: String, defaultValue: String?) : ReadWriteProperty<Any?, String?>
A ReadWriteProperty delegate that provides concise, type-safe access to SharedPreferences for nullable strings.
Parameters
prefs
The SharedPreferences instance to back the property.
key
The key used to store and retrieve the value.
default
The default value to return if no value is found.