21 files declare their use of CacheableDependencyTrait in Drupal 9
- Broken.php in core/lib/ Drupal/ Core/ Block/ Plugin/ Block/ Broken.php 
- CacheableAccessDeniedHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableAccessDeniedHttpException.php 
- CacheableBadRequestHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableBadRequestHttpException.php 
- CacheableConflictHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableConflictHttpException.php 
- CacheableGoneHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableGoneHttpException.php 
- CacheableHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableHttpException.php 
- CacheableLengthRequiredHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableLengthRequiredHttpException.php 
- CacheableMethodNotAllowedHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableMethodNotAllowedHttpException.php 
- CacheableNormalization.php in core/modules/ jsonapi/ src/ Normalizer/ Value/ CacheableNormalization.php 
- CacheableNotAcceptableHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableNotAcceptableHttpException.php 
- CacheableNotFoundHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableNotFoundHttpException.php 
- CacheablePreconditionFailedHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheablePreconditionFailedHttpException.php 
- CacheablePreconditionRequiredHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheablePreconditionRequiredHttpException.php 
- CacheableServiceUnavailableHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableServiceUnavailableHttpException.php 
- CacheableTooManyRequestsHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableTooManyRequestsHttpException.php 
- CacheableUnauthorizedHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableUnauthorizedHttpException.php 
- CacheableUnprocessableEntityHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableUnprocessableEntityHttpException.php 
- CacheableUnsupportedMediaTypeHttpException.php in core/lib/ Drupal/ Core/ Http/ Exception/ CacheableUnsupportedMediaTypeHttpException.php 
- Link.php in core/modules/ jsonapi/ src/ JsonApiResource/ Link.php 
- Resource.php in core/modules/ media/ src/ OEmbed/ Resource.php 
- ResourceObject.php in core/modules/ jsonapi/ src/ JsonApiResource/ ResourceObject.php 
