         attach the value of the "columnClasses" attribute of the
            <code>UIData</code> component per the attribute
            description below.
            Recursively encode each child of each <code>UIColumn</code>
            child.
            Close out the "td" or "th" element. When done with the row, close
            out the "tr" element. When done with all the rows, close out the
            "tbody" element.</p>
            </ul>
            <p>When done rendering all the rows, set the "