6 files declare their use of Uuid in Drupal 10

CKEditor5MediaController.php in core/modules/ckeditor5/src/Controller/CKEditor5MediaController.php

ConfigEntityTest.php in core/modules/config/tests/src/Functional/ConfigEntityTest.php

ConfigInstallProfileOverrideTest.php in core/modules/config/tests/src/Functional/ConfigInstallProfileOverrideTest.php

EntityFieldDefaultValueTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityFieldDefaultValueTest.php

UuidItemTest.php in core/modules/field/tests/src/Kernel/String/UuidItemTest.php

UuidTest.php in core/tests/Drupal/Tests/Component/Uuid/UuidTest.php