srecord noeq G22ChallengePanel(G22Challenge challenge) is Swingable {
  transient int randomSeed = randomInt();
  transient JPanel imagesPanel = jline();
  
  JComponent visualize() {
    ret jvsplit(
      northAndCenterWithMargin(
        jRightAlignedLine("Random seed: ", dm_label(intToHex_upper(randomSeed))),
        jCenteredRaisedSection("Images", jscrollHorizontal(imagesPanel))
      ),
      jCenteredSection("Analysis",
        jTodo()
      )
    );
  }
}