ObjLoading/ObjWriting: Initial skeleton for loading and writing obj files

src/ObjCommon/ObjContainer/ObjContainerReferenceable.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "IObjContainer.h"
+#include "Zone/Zone.h"
+
+#include <set>
+
+class ObjContainerReferenceable : public IObjContainer
+{
+    std::set<Zone*> m_references;
+
+public:
+    void AddReference(Zone* referencer);
+    bool RemoveReference(Zone* zone);
+    bool IsReferenced() const;
+};