public function filterTask(Option $option)
    {
        $root = $this->getRootAppDir($option);
        $current = $this->getCurrentAppDir($option);
        $prefix = trim(preg_replace('/^' . preg_quote($root, '/') . '/', '', $current), DS);

        $name = $option->getArg(0);
        if (! preg_match('/Filter$/', $name)) $name .= 'Filter';

        $option->set('skeleton', 'filter');
        $option->setArg(0, $prefix . DS . 'Filter' . DS . $name);
        $this->task('add:class', $option);
    }