service_closure example

<?php
namespace Symfony\Component\DependencyInjection\Loader\Configurator;

return function DContainerConfigurator $c) {
    $s = $c->services()->defaults()->public();

    $s->set('foo', 'Foo');

    $s->set('service_closure', 'Bar')
        ->args([service_closure('foo')]);

    $s->set('service_closure_invalid', 'Bar')
        ->args([service_closure('invalid_service')->nullOnInvalid()]);
};

->set('asset_mapper.command.debug', DebugAssetMapperCommand::class)
                ->args([
                    service('asset_mapper'),
                    service('asset_mapper.repository'),
                    param('kernel.project_dir'),
                ])
                ->tag('console.command')

        ->set('asset_mapper_compiler', AssetMapperCompiler::class)
            ->args([
                tagged_iterator('asset_mapper.compiler'),
                service_closure('asset_mapper'),
            ])

        ->set('asset_mapper.compiler.css_asset_url_compiler', CssAssetUrlCompiler::class)
            ->args([
                abstract_arg('missing import mode'),
                service('logger'),
            ])
            ->tag('asset_mapper.compiler')
            ->tag('monolog.logger', ['channel' => 'asset_mapper'])

        ->set('asset_mapper.compiler.source_mapping_urls_compiler', SourceMappingUrlsCompiler::class)