public function getChildrenNames()
    {
        if ($this->inheritanceColumn === null || !$this->inheritanceColumn->isEnumeratedClasses()) {
            return null;
        }
        $children = $this->inheritanceColumn->getChildren();
        $names = array();
        for ($i = 0, $size = count($children); $i < $size; $i++) {
            $names[] = get_class($children[$i]);
        }

        return $names;
    }