Dart APIsettings_appearanceSettingsAppearanceEventthemeMode themeMode property Null safety ThemeMode themeMode inherited Implementation ThemeMode get themeMode => throw _privateConstructorUsedError; unself_settings_appearance settings_appearance SettingsAppearanceEvent themeMode property SettingsAppearanceEvent class Constructors setThemeMode Properties copyWith hashCode runtimeType themeMode Methods map mapOrNull maybeMap maybeWhen noSuchMethod toString when whenOrNull Operators operator ==