gistfile1.txt

final class ContactsService {
    let userAPI = UserAPI()
    private(set) var contacts = [Contact]()
    private let contactsActor = TaskActor<[Contact]>()

    func fetchContacts() async throws {
        contacts = try await contactsActor.run { [weak self] in
            try await self?.userAPI.fetchAllUsersInContacts() ?? []
        }
    }
}