* <tr><td><code>plugin.*</code></td>          <td></td>               <td></td></tr>
 * <tr><td><code>*</code></td>                 <td></td>               <td>user properties</td></tr>
 * <tr><td><code>*</code></td>                 <td></td>               <td>project properties</td></tr>
 * <tr><td><code>*</code></td>                 <td></td>               <td>system properties</td></tr>
 * </table>

        // <thead>
        //   <tr>
        //     <td>Property</td>
        //     <td>Description</td>
        //   </tr>
        // </thead>
        Element thead = document.createElement("thead");
        parent.appendChild(thead);
        Element tr = document.createElement("tr");
        thead.appendChild(tr);
        Element td = document.createElement("td");
        tr.appendChild(td);

        // <thead>
        //   <tr>
        //     <td>Method</td>
        //     <td>Description</td>
        //   </tr>
        // </thead>
        Element thead = document.createElement("thead");
        parent.appendChild(thead);
        Element tr = document.createElement("tr");
        thead.appendChild(tr);
        Element td = document.createElement("td");
        tr.appendChild(td);

     * </tr>
     * <tr>
     * <td>SID_TYPE_ALIAS</td>
     * <td>Local group</td>
     * </tr>
     * <tr>
     * <td>SID_TYPE_WKN_GRP</td>
     * <td>Builtin group</td>
     * </tr>
     * <tr>
     * <td>SID_TYPE_DELETED</td>
     * <td>Deleted</td>
     * </tr>
     * <tr>
     * <td>SID_TYPE_INVALID</td>
     * <td>Invalid</td>
     * </tr>
     * <tr>
     * <td>SID_TYPE_UNKNOWN</td>

        // <thead>
        //   <tr>
        //     <td>Block</td>
        //     <td>Description</td>
        //   </tr>
        // </thead>
        Element thead = document.createElement("thead");
        parent.appendChild(thead);
        Element tr = document.createElement("tr");
        thead.appendChild(tr);
        Element td = document.createElement("td");
        tr.appendChild(td);

 * </tr>
 * <tr>
 * <td>{@link DateFormat#FULL}の形式</td>
 * <td>{@literal H'時'mm'分'ss'秒' z}</td>
 * </tr>
 * <tr>
 * <td rowspan="4">プレーン形式</td>
 * <td>{@link DateFormat#SHORT}の区切り文字を除去した形式</td>
 * <td>{@literal HHmm}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#MEDIUM}の区切り文字を除去した形式</td>
 * <td>{@literal HHmmss}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#LONG}の区切り文字を除去した形式</td>

        Set<String> signatures = new HashSet<String>();

        for (Element tr : children(classDoc.getMethodsTable(), "tr")) {
            List<Element> cells = children(tr, "td");
            if (cells.size() != 1) {
                throw new RuntimeException(String.format("Expected 1 cell in <tr>, found: %s", tr));
            }
            String methodName = cells.get(0).getTextContent().trim();

 *
 * <p>For details on the behavior of the escapers in this class, see sections <a
 * href="http://www.w3.org/TR/2008/REC-xml-20081126/#charsets">2.2</a> and <a
 * href="http://www.w3.org/TR/2008/REC-xml-20081126/#syntax">2.4</a> of the XML specification.
 *
 * @author Alex Matevossian
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible

     * <caption>Copied JavaBeans Properties</caption>
     * <tr>
     * <th>JavaBeansのプロパティ名</th>
     * <th>{@literal Map}のプロパティ名</th>
     * </tr>
     * <tr>
     * <td>{@literal foo}</td>
     * <td>{@literal foo}</td>
     * </tr>
     * <tr>
     * <td>{@literal foo_bar}</td>
     * <td>{@literal foo.bar}</td>
     * </tr>
     * <tr>
     * <td>{@literal foo_bar_baz}</td>

 * </tr>
 * <tr>
 * <td>{@link DateFormat#FULL}の形式</td>
 * <td>{@literal yyyy'年'M'月'd'日'}</td>
 * </tr>
 * <tr>
 * <td rowspan="4">プレーン形式</td>
 * <td>{@link DateFormat#SHORT}の区切り文字を除去した形式</td>
 * <td>{@literal yyMMdd}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#MEDIUM}の区切り文字を除去した形式</td>
 * <td>{@literal yyyyMMdd}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#LONG}の区切り文字を除去した形式</td>