Pulls images for container configurations along their dependency path.

        :param container: Container configuration name.
        :type container: unicode | str
        :param map_name: Container map name.
        :type map_name: unicode | str
        :param instances: Not applicable for images.
        :type instances: unicode | str
        :param kwargs: Keyword arguments to the script runner function.
        :return: Return values of actions.
        :rtype: list[dockermap.map.runner.ActionOutput]

def pull_images(self, container, instances=None, map_name=None, **kwargs):
        """
        Pulls images for container configurations along their dependency path.

        :param container: Container configuration name.
        :type container: unicode | str
        :param map_name: Container map name.
        :type map_name: unicode | str
        :param instances: Not applicable for images.
        :type instances: unicode | str
        :param kwargs: Keyword arguments to the script runner function.
        :return: Return values of actions.
        :rtype: list[dockermap.map.runner.ActionOutput]
        """
        return self.run_actions('pull_images', container, map_name=map_name, **kwargs)