[Pharo-project] NativeBoost help

Hi Igor and other NB Gurus, A group of students is trying to use NativeBoost to wrap the OpenCV C image library. The problem we are facing is that the function cvSize return a struct. typedef struct { int width; int height; } CvSize; CV_INLINE CvSize cvSize( int width, int height ); But the NBExternalStructure seems to not support that if I understood correctly. NBExternalStructure>>coerceReturn: gen " ... should we support handling return of external structures? " self error: 'returning pointer to structure?' Did I miss something? Any idea or workaround? Thanks, Luc