public function _mergeSuperClassData(&$rootDoc, $parent = NULL)
{
$classes =& $rootDoc->classes();
foreach ($classes as $name => $class) {
if ($classes[$name]->superclass() == $parent) {
$classes[$name]->mergeSuperClassData();
$this->_mergeSuperClassData($rootDoc, $classes[$name]->name());
}
}
}