11 methods override ServiceModifierInterface::alter() in Drupal 9

AcceptHeaderRoutingTestServiceProvider::alter in core/modules/system/tests/modules/accept_header_routing_test/src/AcceptHeaderRoutingTestServiceProvider.php

Modifies existing service definitions.

ContainerRebuildTestServiceProvider::alter in core/modules/system/tests/modules/container_rebuild_test/src/ContainerRebuildTestServiceProvider.php

Modifies existing service definitions.

CoreServiceProvider::alter in core/lib/Drupal/Core/CoreServiceProvider.php

Alters the UUID service to use the most efficient method available.

ErrorServiceTestServiceProvider::alter in core/modules/system/tests/modules/error_service_test/src/ErrorServiceTestServiceProvider.php

Modifies existing service definitions.

FileServiceProvider::alter in core/modules/file/src/FileServiceProvider.php

Modifies existing service definitions.

HalServiceProvider::alter in core/modules/hal/src/HalServiceProvider.php

Modifies existing service definitions.

InstallerServiceProvider::alter in core/lib/Drupal/Core/Installer/InstallerServiceProvider.php

Modifies existing service definitions.

JsonapiServiceProvider::alter in core/modules/jsonapi/src/JsonapiServiceProvider.php

Modifies existing service definitions.

ServiceProviderBase::alter in core/lib/Drupal/Core/DependencyInjection/ServiceProviderBase.php

Modifies existing service definitions.

ServiceProviderTestServiceProvider::alter in core/modules/system/tests/modules/service_provider_test/src/ServiceProviderTestServiceProvider.php

Modifies existing service definitions.

UpdateServiceProvider::alter in core/lib/Drupal/Core/Update/UpdateServiceProvider.php

Modifies existing service definitions.