14 files declare their use of Container in Service Container 7

Container.php in lib/Drupal/Core/DependencyInjection/Container.php

Contains \Drupal\Core\DependencyInjection\Container.

ContainerBuilder.php in lib/Drupal/Core/DependencyInjection/ContainerBuilder.php

Contains \Drupal\Core\DependencyInjection\ContainerBuilder.

ContainerTest.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/ContainerTest.php

Extension.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Extension/Extension.php

PhpDumper.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

services1-1.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php

services1.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php

services10.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php

services12.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php

services19.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services19.php

services20.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services20.php

services8.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php

services9.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php

services9_compiled.php in modules/providers/service_container_symfony/lib/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php