code: public void setImageShapeLoadedHandler(final ImageShapeLoadedHandler<T> handler)
      {
          m_handler = handler;
  
          if ((null != m_handler) && (m_is_done))
          {
              m_handler.onImageShapeLoaded(m_image);
          }
      }
docs: Sets the {@link ImageShapeLoadedHandler} that will be notified when the image is loaded.
  If the image is already loaded, the handler will be invoked immediately.
  
  @param handler {@link ImageShapeLoadedHandler}