some changes are done related to the fetcher

Package.resolved

@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "GTMSessionFetcher",
+        "repositoryURL": "https://github.com/google/gtm-session-fetcher.git",
+        "state": {
+          "branch": null,
+          "revision": "bc6a19702ac76ac4e488b68148710eb815f9bc56",
+          "version": "1.7.0"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Source/Objects/GTLRService.h

@@ -278,6 +278,8 @@ typedef void (^GTLRServiceTestBlock)(GTLRServiceTicket *testTicket,
  */
 @property(nonatomic, copy, nullable) NSString *APIKey;
 
+@property(nonatomic, retain, nullable) GTMSessionFetcher *fetcher;
+
 /**
  *  The Bundle Identifier to use for the API key restriction. This will be
  *  sent in an X-Ios-Bundle-Identifier header; for more information see

Source/Objects/GTLRService.m

@@ -701,8 +701,7 @@ - (GTLRServiceTicket *)fetchObjectWithURL:(NSURL *)targetURL
   }
 
   GTMSessionFetcherService *fetcherService = ticket.fetcherService;
-  GTMSessionFetcher *fetcher;
-
+    GTMSessionFetcher *fetcher;
   if (uploadParams == nil || uploadParams.shouldUploadWithSingleRequest) {
     // Create a single-request fetcher.
     fetcher = [fetcherService fetcherWithRequest:request];
@@ -712,6 +711,7 @@ - (GTLRServiceTicket *)fetchObjectWithURL:(NSURL *)targetURL
                                       params:uploadParams];
   }
 
+  self.fetcher = fetcher;
   if (ticket.allowInsecureQueries) {
     fetcher.allowLocalhostRequest = YES;
     fetcher.allowedInsecureSchemes = @[ @"http" ];