code: public static Image findImageByTag( String imageTag, List<Image> images ) {
  
  		Image result = null;
  		for( Image img : images ) {
  			String[] tags = img.getRepoTags();
  			if( tags == null )
  				continue;
  
  			for( String s : tags ) {
  				if( s.contains( imageTag )) {
  					result = img;
  					break;
  				}
  			}
  		}
  
  		return result;
  	}
docs: Finds an image by tag.
  @param imageTag the image tag (not null)
  @param images a non-null list of images
  @return an image, or null if none was found