batch fix

src/objective-c/GRPCClient/private/GRPCInsecureChannelFactory.m

@@ -33,7 +33,7 @@
 }
 
 - (grpc_channel *)createChannelWithHost:(NSString *)host channelArgs:(NSDictionary *)args {
-  grpc_channel_args *coreChannelArgs = GRPCBuildChannelArgs([args copy]);
+  grpc_channel_args *coreChannelArgs = GRPCBuildChannelArgs(args);
   grpc_channel *unmanagedChannel =
       grpc_insecure_channel_create(host.UTF8String, coreChannelArgs, NULL);
   GRPCFreeChannelArgs(coreChannelArgs);

src/objective-c/GRPCClient/private/GRPCSecureChannelFactory.m

@@ -119,7 +119,7 @@
   if (host.length == 0) {
     return NULL;
   }
-  grpc_channel_args *coreChannelArgs = GRPCBuildChannelArgs([args copy]);
+  grpc_channel_args *coreChannelArgs = GRPCBuildChannelArgs(args);
   grpc_channel *unmanagedChannel =
       grpc_secure_channel_create(_channelCreds, host.UTF8String, coreChannelArgs, NULL);
   GRPCFreeChannelArgs(coreChannelArgs);

src/objective-c/GRPCClient/private/GRPCWrappedCall.m

@@ -307,6 +307,10 @@
 - (void)channelDisconnected {
   @synchronized(self) {
     if (_call != NULL) {
+      // Unreference the call will lead to its cancellation in the core. Note that since
+      // this function is only called with a network state change, any existing GRPCCall object will
+      // also receive the same notification and cancel themselves with GRPCErrorCodeUnavailable, so
+      // the user gets GRPCErrorCodeUnavailable in this case.
       grpc_call_unref(_call);
       _call = NULL;
     }