public function updateContentClassNames(&$classes)
    {
        if (!$this->apply()) {
            return;
        }
        
        foreach ($this->getTextAlignmentClassNames() as $class) {
            $classes[] = $class;
        }
        
        foreach ($this->getImageAlignmentClassNames() as $class) {
            $classes[] = $class;
        }
    }