FSupportedAreaData Not Being Exported

FSupportedAreaData is causing an unresolved linker error when it is used.

1. Open the editor
2. Create a new C++ Class based on AAbstractNavData (AMyAbstractNavData)
3. Include Runtime/Engine/Classes/AI/Navigation/NavigationData.h and Runtime/Engine/Classes/AI/Navigation/NavAreas/NavArea_Default.h
4. Declare a constructor

   AMyAbstractNavData();

5. In the .cpp, add the following:

   AMyAbstractNavData::AMyAbstractNavData()
   {
   
   SupportedAreas.Add(FSupportedAreaData(UNavArea_Default::StaticClass(), null));
   
   }

6. Attempt to compile

Result: Unresolved linker error