code: def properties(dataset_uri, item_identifier):
      
      dataset = dtoolcore.DataSet.from_uri(dataset_uri)
      try:
          props = dataset.item_properties(item_identifier)
      except KeyError:
          click.secho(
              "No such item in dataset: {}".format(item_identifier),
              fg="red",
              err=True
          )
          sys.exit(20)
  
      json_lines = [
          '{',
          '  "relpath": "{}",'.format(props["relpath"]),
          '  "size_in_bytes": {},'.format(props["size_in_bytes"]),
          '  "utc_timestamp": {},'.format(props["utc_timestamp"]),
          '  "hash": "{}"'.format(props["hash"]),
          '}',
      ]
      formatted_json = "\n".join(json_lines)
      colorful_json = pygments.highlight(
          formatted_json,
          pygments.lexers.JsonLexer(),
          pygments.formatters.TerminalFormatter())
      click.secho(colorful_json, nl=False)
docs: Report item properties.