> +/**
> + * @author Andrea Turli
> + */
> +public class ImageToImage implements 
> Function<org.jclouds.docker.domain.Image, org.jclouds.compute.domain.Image> {
> +
> +   private static final String CENTOS = "centos";
> +   private static final String UBUNTU = "ubuntu";
> +
> +   @Resource
> +   @Named(ComputeServiceConstants.COMPUTE_LOGGER)
> +   protected Logger logger = Logger.NULL;
> +
> +   @Override
> +   public Image apply(org.jclouds.docker.domain.Image from) {
> +      checkNotNull(from, "image");
> +      String description = 
> checkNotNull(Iterables.getFirst(from.getRepoTags(), null));

Add a message to the null check.

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