code: private function copyAttachment(Model\SaleAttachmentInterface $source, Model\SaleAttachmentInterface $target)
      {
          $this->copy($source, $target, [
              'path', 'title', 'type', 'size', 'internal', 'createdAt', 'updatedAt',
          ]);
      }
docs: Copies the source attachment into the target attachment.
  
  @param Model\SaleAttachmentInterface $source
  @param Model\SaleAttachmentInterface $target