er and footer.</p>
            </ul>
            <p>Rendering the header</p>
            <ul>
            <p>If the <code>UIData</code> component has a
            "header" facet, or
            any of the child <code>UIColumn</code> components has a
            "header"
            facet, render a "thead" element. If the <code>UIData</code>
            component has a "header" facet, encode its contents inside of "tr"
            and "th" elements, respectively. Output the value of the
            "headerC