Contrib: Issue #3345646 -...

core/modules/package_manager/package_manager.info.yml

core/modules/package_manager/src/ComposerInspector.php

core/modules/package_manager/src/InstalledPackage.php

.../package_manager/src/PathExcluder/UnknownPathExcluder.php

...ackage_manager/tests/src/Kernel/ComposerInspectorTest.php

...ge_manager/tests/src/Kernel/InstalledPackagesListTest.php

...sts/src/Kernel/OverwriteExistingPackagesValidatorTest.php

...s/package_manager/tests/src/Unit/InstalledPackageTest.php

...kage_manager/tests/src/Unit/InstalledPackagesListTest.php