6 files declare their use of RestResource

DbLogResource.php in core/modules/dblog/src/Plugin/rest/resource/DbLogResource.php
EntityResource.php in core/modules/rest/src/Plugin/rest/resource/EntityResource.php
FileUploadResource.php in core/modules/file/src/Plugin/rest/resource/FileUploadResource.php
NoSerializationClassTestResource.php in core/modules/rest/tests/modules/rest_test/src/Plugin/rest/resource/NoSerializationClassTestResource.php
ResourcePluginManager.php in core/modules/rest/src/Plugin/Type/ResourcePluginManager.php
UserRegistrationResource.php in core/modules/user/src/Plugin/rest/resource/UserRegistrationResource.php

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