From bd487ac1f6461d770354a97808b22d821b790345 Mon Sep 17 00:00:00 2001
From: Frank Dellaert <dellaert@users.noreply.github.com>
Date: Wed, 16 Feb 2022 16:12:47 -0500
Subject: [PATCH] add using...

---
 tests/testSerializationSlam.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/testSerializationSlam.cpp b/tests/testSerializationSlam.cpp
index bc2f5e864..3a1798f5e 100644
--- a/tests/testSerializationSlam.cpp
+++ b/tests/testSerializationSlam.cpp
@@ -614,6 +614,8 @@ static GaussianFactorGraph read(const string& name) {
 /* ************************************************************************* */
 // Read from XML file
 TEST(SubgraphSolver, Solves) {
+  using gtsam::example::planarGraph;
+  
   // Create preconditioner
   SubgraphPreconditioner system;