From f69a885f176c1bac9b15d7b270a9dc50fbf3a4f6 Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Wed, 8 Mar 2017 14:54:11 -0800
Subject: [PATCH] Add comment to encodingOverhead

---
 src/objective-c/tests/InteropTests.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 766fa19d857..d964f53e8e2 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -90,6 +90,9 @@
   return nil;
 }
 
+// This number indicates how many bytes of overhead does Protocol Buffers encoding add onto the
+// message. The number varies as different message.proto is used on different servers. The actual
+// number for each interop server is overridden in corresponding derived test classes.
 - (int32_t)encodingOverhead {
   return 0;
 }