func (c *rawImageFromDockerfile) toImageFromDockerfileDirectives(giterminismManager giterminism_manager.Interface) (images []*ImageFromDockerfile, err error) {
    for _, imageName := range c.Images {
        if image, err := c.toImageFromDockerfileDirective(giterminismManager, imageName); err != nil {
            return nil, err
        } else {