Pull the image digest.

        Args:
            platform (str): The platform to pull the image for.
            Default: ``None``

        Returns:
            (:py:class:`Image`): A reference to the pulled image.

def pull(self, platform=None):
        """
        Pull the image digest.

        Args:
            platform (str): The platform to pull the image for.
            Default: ``None``

        Returns:
            (:py:class:`Image`): A reference to the pulled image.
        """
        repository, _ = parse_repository_tag(self.image_name)
        return self.collection.pull(repository, tag=self.id, platform=platform)