7 files declare their use of UnprocessableEntityException in RESTful 7.2

DataProvider.php in src/Plugin/resource/DataProvider/DataProvider.php

Contains \Drupal\restful\Plugin\resource\DataProvider\DataProvider.

DataProviderEntity.php in src/Plugin/resource/DataProvider/DataProviderEntity.php

Contains \Drupal\restful\Plugin\resource\DataProvider\DataProviderEntity.

DataProviderVariable.php in modules/restful_example/src/Plugin/resource/variables/DataProviderVariable.php

Contains \Drupal\restful_example\Plugin\resource\variables\DataProviderVariable.

ResourceFieldEntity.php in src/Plugin/resource/Field/ResourceFieldEntity.php

Contains \Drupal\restful\Plugin\resource\Field\ResourceFieldEntity

Response.php in src/Http/Response.php

Contains \Drupal\restful\Http\Response.

ResponseInterface.php in src/Http/ResponseInterface.php

Contains \Drupal\restful\Http\ResponseInterface.

RestfulListTestCase.test in tests/RestfulListTestCase.test

Contains RestfulListTestCase.