kiwi_register_singleton.dart

// Registers a new singleton.
container.registerSingleton((c) => Sith('Anakin', 'Skywalker'));

// Registers a new singleton with a specified name.
container.registerSingleton((c) => Sith('Anakin', 'Skywalker'), name: 'DartVader');

// Registers a new singleton, with a specified name, and under a supertype.
container.registerSingleton<Character, Sith>((c) => Sith('Anakin', 'Skywalker'), name: 'DartVader');