field containers.
                </p>
              </td>
</tr></tbody>
</table></div>
<p>
        This container is designed to store the field value pairs that make up the
        fields and trailers in an HTTP message. Objects of this type are iterable,
        with each element holding the field name and field value.
      </p>
<p>
        Field names are stored as-is, but comparisons are case-insensitive. The container
        behaves as a <code class="computeroutput"><span class="identifier">std</spa