class="deprecated" href="dart-io/HttpStatus/UNAUTHORIZED-constant.html">UNAUTHORIZED</a></li>
      <li><a href="dart-io/HttpStatus/unauthorized-constant.html">unauthorized</a></li>
      <li><a href="dart-io/HttpStatus/unavailableForLegalReasons-constant.html">unavailableForLegalReasons</a></li>
      <li><a href="dart-io/HttpStatus/unprocessableEntity-constant.html">unprocessableEntity</a></li>
      <li><a class="deprecated" href="dart-io/HttpStatus/UNSUPPORTED_MEDIA_TYPE-constant.html">UNSUPPORTED_MEDIA