FlatMapping Multiple Asynchronous API calls using Swift 5's new Result type

MultipleAsyncAPIs.swift

    func simulateAnotherCall(_ param: String?) -> Result<String?, NWError> {
        return makeAPICall()
    }

    func load() {
        DispatchQueue.global(qos: .utility).async {
            // make first api call and flatMap second and third api calls
            let result = self.apiTest()
                .flatMap { self.simulateAnotherCall($0) }
                .flatMap { self.simulateAnotherCall($0) }

            // handle result
            DispatchQueue.main.async {
                switch result {
                case let .success(data):
                    print(data)
                case let .failure(error):
                    print(error)
                }
            }
        }
    }