code: def create_crop(self, name, x, x2, y, y2):
          
          if self._can_crop():
              spec = get_image_cropper().create_crop(name, self.file, x=x,
                                                     x2=x2, y=y, y2=y2)
              ImageDetail.save_crop_spec(self, spec)
docs: Create a crop for this asset.