SalesChannelEntityCompilerPass example

$loader->load('salutation.xml');
        $loader->load('tax.xml');
        $loader->load('tax_provider.xml');
        $loader->load('unit.xml');
        $loader->load('user.xml');
        $loader->load('integration.xml');
        $loader->load('state_machine.xml');
        $loader->load('configuration.xml');
        $loader->load('number_range.xml');
        $loader->load('tag.xml');

        $container->addCompilerPass(new SalesChannelEntityCompilerPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, 0);
        $container->addCompilerPass(new RedisNumberRangeIncrementerCompilerPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, 0);
    }

    public function boot(): void
    {
        parent::boot();

        \assert($this->container instanceof ContainerInterface, 'Container is not set yet, please call setContainer() before calling boot(), see `src/Core/Kernel.php:186`.');

        $this->container->get(CustomEntityRegistrar::class)->register();
    }
}