code: def show(dataset_uri, overlay_name):
      
      dataset = dtoolcore.DataSet.from_uri(dataset_uri)
      try:
          overlay = dataset.get_overlay(overlay_name)
      except:  # NOQA
          click.secho(
              "No such overlay: {}".format(overlay_name),
              fg="red",
              err=True
          )
          sys.exit(11)
  
      formatted_json = json.dumps(overlay, indent=2)
      colorful_json = pygments.highlight(
          formatted_json,
          pygments.lexers.JsonLexer(),
          pygments.formatters.TerminalFormatter())
      click.secho(colorful_json, nl=False)
docs: Show the content of a specific overlay.