final class ViewController: UIViewController {
    @Inject(Self.self) var apiClient: APIClientProtocol
    
    ...
}

// Production
DIResolver.register(ViewController.self, keyPath: \.apiClient, value: ProductionAPIClient())

// Test
DIResolver.register(ViewController.self, keyPath: \.apiClient, value: MockAPIClient())

struct Environment {
    @Inject(Self.self) var endpoint: URL
    @Inject(Self.self) var timeZone: TimeZone
}

DIResolver.register(Environment.self) {
    Register(URL.self, URL(string: "https://example.com")!)
    Register(TimeZone.self, TimeZone(identifier: "Asia/Tokyo")!)
}