* @return The status of the table header layout.
* @throws AreaTreeException For errors.
*/
private Status layoutTableHeader(final TableArea tableArea,
final GraftingPoint graftingPoint) throws AreaTreeException {
final TableHeader th = this.table.getTableHeader();
if (th == null) {
return Status.OK;
}
final TableHeaderPL tableHeaderPL = (TableHeaderPL) getLayoutProxy(th);
final Status status = tableHeaderPL.layout(tableArea, graftingPoint);