From a103e8f93a13557ce7ab7991d0f20b76a86123a6 Mon Sep 17 00:00:00 2001
From: Alexander Belyaev <32522095+pifon2a@users.noreply.github.com>
Date: Thu, 25 Jan 2018 08:59:52 +0100
Subject: [PATCH] Implement 'num_trajectory_builders' in map_builder_stub.
 (#845)

A huuuuuge PR.
---
 cartographer_grpc/mapping/map_builder_stub.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cartographer_grpc/mapping/map_builder_stub.cc b/cartographer_grpc/mapping/map_builder_stub.cc
index 4c07563..556607c 100644
--- a/cartographer_grpc/mapping/map_builder_stub.cc
+++ b/cartographer_grpc/mapping/map_builder_stub.cc
@@ -98,7 +98,7 @@ void MapBuilderStub::LoadMap(
 }
 
 int MapBuilderStub::num_trajectory_builders() const {
-  LOG(FATAL) << "Not implemented";
+  return trajectory_builder_stubs_.size();
 }
 
 cartographer::mapping::PoseGraphInterface* MapBuilderStub::pose_graph() {