 
     // swiftlint:disable function_body_length
     func performRequest(_ httpMethod: String,
-                        serially: Bool = false,
+                        serially: Bool = true,
                         path: String,
                         requestBody maybeRequestBody: [String: Any]?,
                         authHeaders: [String: String],

        self.eTagManager = eTagManager
    }

    func performGETRequest(serially: Bool = false,
                           path: String,
                           headers authHeaders: [String: String],
                           completionHandler: ((Int, [String: Any]?, Error?) -> Void)?) {

                       completionHandler: completionHandler)
    }

    func performPOSTRequest(serially: Bool = true,
                            path: String,
                            requestBody: [String: Any],
                            headers authHeaders: [String: String],
