YiiRewriteMap.php代码：
return [
'\fecshop\app\appfront\modules\Catalog\block\product\CustomOption' => '\appfront\local\local_modules\Catalog\block\product\CustomOption',
];
@appfront\local\local_modules\Catalog\block\product\CustomOption.php代码：
<?php
namespace appfront\local\local_modules\Catalog\block\product;
use Yii;
class CustomOption extends \fecshop\app\appfront\modules\Catalog\block\product\CustomOption
{
public function getLastData()
{
...
}
}