How does laravel run composer dump autoload without emptying the classmap mapping relationship?

I think laravel Of composer.json file autoload No configuration vendor/autoload_classmap.php The mapping relationship in , Normally , If not configured , perform composer dump-autoload The array of this file will be emptied ？ But after I did it , The mapping relationship is still ,laravel How can it not be emptied , Is there any configuration ？

perform composer dump-autoload after vendor/composer/autoload_classmap.php, Will delete , And then re established

dump-autoload It is used to generate automatic loading , If you have run , Just upload it directly （ You need to pay attention to the path ）

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