Error fix

Author: arjuninv

lib/clientStub.js

@@ -1,6 +1,6 @@
 "use strict";
 var __assign = (this && this.__assign) || function () {
-    __assign = Object.assign || function(t) {
+    __assign = Object.assign || function (t) {
         for (var s, i = 1, n = arguments.length; i < n; i++) {
             s = arguments[i];
             for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
@@ -20,8 +20,8 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 var __generator = (this && this.__generator) || function (thisArg, body) {
-    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
-    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    var _ = { label: 0, sent: function () { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function () { return this; }), g;
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
@@ -71,7 +71,7 @@ var DgraphClientStub = (function () {
             stubConfig.jsonParser !== undefined
                 ? stubConfig.jsonParser
                 :
-                    JSON.parse.bind(JSON);
+                JSON.parse.bind(JSON);
     }
     DgraphClientStub.prototype.detectApiVersion = function () {
         return __awaiter(this, void 0, void 0, function () {
@@ -170,9 +170,9 @@ var DgraphClientStub = (function () {
                 url += "?";
                 url += params
                     .map(function (_a) {
-                    var key = _a.key, value = _a.value;
-                    return key + "=" + value;
-                })
+                        var key = _a.key, value = _a.value;
+                        return key + "=" + value;
+                    })
                     .join("&");
             }
         }
@@ -197,8 +197,8 @@ var DgraphClientStub = (function () {
             body = "{\n                " + (mu.setNquads === undefined
                 ? ""
                 : "set {\n                    " + mu.setNquads + "\n                }") + "\n                " + (mu.deleteNquads === undefined
-                ? ""
-                : "delete {\n                    " + mu.deleteNquads + "\n                }") + "\n            }";
+                    ? ""
+                    : "delete {\n                    " + mu.deleteNquads + "\n                }") + "\n            }";
         }
         else if (mu.mutation !== undefined) {
             body = mu.mutation;
@@ -237,8 +237,10 @@ var DgraphClientStub = (function () {
                 headers["X-Dgraph-CommitNow"] = "true";
             }
         }
-        return this.callAPI(url, __assign(__assign({}, this.options), { method: "POST", body: body,
-            headers: headers }));
+        return this.callAPI(url, __assign(__assign({}, this.options), {
+            method: "POST", body: body,
+            headers: headers
+        }));
     };
     DgraphClientStub.prototype.commit = function (ctx) {
         var body;
@@ -333,7 +335,6 @@ var DgraphClientStub = (function () {
         this.maybeStartRefreshTimer(this.accessToken);
     };
     DgraphClientStub.prototype.setAlphaAuthToken = function (authToken) {
-        this.options.headers === undefined && (this.options.headers = {});
         this.options.headers[ALPHA_AUTH_TOKEN_HEADER] = authToken;
     };
     DgraphClientStub.prototype.setSlashApiKey = function (apiKey) {