message: undo accidental modification
diff: #include <cstddef>
  #include "Containers/UnrealString.h"
  -class __declspec(dllexport) UnrealAssetAccessor
  +class CESIUMRRUNTIME_API UnrealAssetAccessor
  : public CesiumAsync::IAssetAccessor {
  public:
  UnrealAssetAccessor();
  