diff --git a/src/Mod/Mesh/App/Exporter.cpp b/src/Mod/Mesh/App/Exporter.cpp
index 2ec054d986..bd21ff0106 100644
--- a/src/Mod/Mesh/App/Exporter.cpp
+++ b/src/Mod/Mesh/App/Exporter.cpp
@@ -50,9 +50,9 @@ using namespace Mesh;
 using namespace MeshCore;
 
 static std::vector<std::string>
-expandSubObjects(const App::DocumentObject *obj,
-                 std::map<const App::DocumentObject*, std::vector<std::string> > &cache,
-                 int depth)
+expandSubObjectNames(const App::DocumentObject *obj,
+                     std::map<const App::DocumentObject*, std::vector<std::string> > &subObjectNameCache,
+                     int depth)
 {
     if (!App::GetApplication().checkLinkDepth(depth))
         return {};
@@ -72,9 +72,10 @@ expandSubObjects(const App::DocumentObject *obj,
         if (!sobj || (vis < 0 && !sobj->Visibility.getValue()))
             continue;
         auto linked = sobj->getLinkedObject(true);
-        auto it = cache.find(linked);
-        if (it == cache.end())
-            it = cache.emplace(linked, expandSubObjects(linked, cache, depth+1)).first;
+        auto it = subObjectNameCache.find(linked);
+        if (it == subObjectNameCache.end())
+            it = subObjectNameCache.emplace(
+                    linked, expandSubObjectNames(linked, subObjectNameCache, depth+1)).first;
         for (auto & ssub : it->second)
             res.push_back(sub + ssub);
     }
@@ -99,7 +100,7 @@ std::string Exporter::xmlEscape(const std::string &input)
 int Exporter::addObject(App::DocumentObject *obj, float tol)
 {
     int count = 0;
-    for (std::string & sub : expandSubObjects(obj, cache, 0)) {
+    for (std::string & sub : expandSubObjectNames(obj, subObjectNameCache, 0)) {
         Base::Matrix4D matrix;
         auto sobj = obj->getSubObject(sub.c_str(), nullptr, &matrix);
         auto linked = sobj->getLinkedObject(true, &matrix, false);
diff --git a/src/Mod/Mesh/App/Exporter.h b/src/Mod/Mesh/App/Exporter.h
index 3b0b564b57..9ed7f7243c 100644
--- a/src/Mod/Mesh/App/Exporter.h
+++ b/src/Mod/Mesh/App/Exporter.h
@@ -52,6 +52,14 @@ class Exporter
         Exporter();
         virtual ~Exporter() = default;
 
+        /// Add object and all subobjects and links etc. Returns the number of stuff added.
+        /*!
+         * @param obj The object to export. If this is a group like object, its
+         *            sub-objects will be added.
+         * @param tol The tolerance/accuracy with which to generate the triangle mesh
+         * @return The number of objects/subobjects that was exported from the document.
+                   See the parameter `accuracy` of ComplexGeoData::getFaces
+         */
         int addObject(App::DocumentObject *obj, float tol);
 
         virtual bool addMesh(const char *name, const MeshObject & mesh) = 0;
@@ -60,7 +68,7 @@ class Exporter
         /// Does some simple escaping of characters for XML-type exports
         static std::string xmlEscape(const std::string &input);
 
-        std::map<const App::DocumentObject *, std::vector<std::string> > cache;
+        std::map<const App::DocumentObject *, std::vector<std::string> > subObjectNameCache;
         std::map<const App::DocumentObject *, MeshObject> meshCache;
 };