EdgeDrawing.empty constructor
      
      EdgeDrawing.empty()
     
    
Creates a smart pointer to a EdgeDrawing object and initializes it.
Implementation
factory EdgeDrawing.empty() {
  final p = calloc<cvg.EdgeDrawing>();
  cvRun(() => ccontrib.cv_ximgproc_EdgeDrawing_create(p));
  return EdgeDrawing.fromPointer(p);
}