From 739760cdc8a6625fe93f4f0312d84305052b0d09 Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Tue, 6 Nov 2018 11:22:51 -0800
Subject: [PATCH] More comment

---
 src/objective-c/GRPCClient/GRPCCall.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index af141935813..9be0554ff98 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -185,6 +185,8 @@ const char *kCFStreamVarName = "grpc_cfstream";
         completionHandler:^(NSError *errorOrNil) {
           dispatch_async(self->_dispatchQueue, ^{
             if (self->_call) {
+              // Clean up the request writers. This should have no effect to _call since its
+              // response writeable is already nullified.
               [self->_pipe writesFinishedWithError:nil];
               self->_call = nil;
               self->_pipe = nil;