From d0d007e6d1139625e05ebd5859289c08a8668033 Mon Sep 17 00:00:00 2001
From: Yang Gao <yangg@google.com>
Date: Wed, 18 Feb 2015 10:28:09 -0800
Subject: [PATCH] change metadata getters to return const&

---
 include/grpc++/client_context.h | 4 ++--
 include/grpc++/server_context.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/grpc++/client_context.h b/include/grpc++/client_context.h
index 7f1069ea5ee..8345a6f5aff 100644
--- a/include/grpc++/client_context.h
+++ b/include/grpc++/client_context.h
@@ -81,12 +81,12 @@ class ClientContext {
   void AddMetadata(const grpc::string &meta_key,
                    const grpc::string &meta_value);
 
-  std::multimap<grpc::string, grpc::string> GetServerInitialMetadata() {
+  const std::multimap<grpc::string, grpc::string>& GetServerInitialMetadata() {
     GPR_ASSERT(initial_metadata_received_);
     return recv_initial_metadata_;
   }
 
-  std::multimap<grpc::string, grpc::string> GetServerTrailingMetadata() {
+  const std::multimap<grpc::string, grpc::string>& GetServerTrailingMetadata() {
     // TODO(yangg) check finished
     return trailing_metadata_;
   }
diff --git a/include/grpc++/server_context.h b/include/grpc++/server_context.h
index 853f91f4671..3a7b693f9a9 100644
--- a/include/grpc++/server_context.h
+++ b/include/grpc++/server_context.h
@@ -76,7 +76,7 @@ class ServerContext final {
   void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
   void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
 
-  std::multimap<grpc::string, grpc::string> client_metadata() {
+  const std::multimap<grpc::string, grpc::string>& client_metadata() {
     return client_metadata_;
   }