0001-single-source-of-truth-010.swift

enum Dependencies {
    // ...
    @propertyWrapper
    struct Inject<T> {
        private let dependencyName: Name
        private let container: Container
        var wrappedValue: T {
            get { container.resolve(dependencyName) }
        }
        init(_ dependencyName: Name = .default, on container: Container = .default) {
            self.dependencyName = dependencyName
            self.container = container
        }
    }
}