6 files declare their use of CacheableResponseTrait
- CacheableResourceResponse.php in core/modules/ jsonapi/ src/ CacheableResourceResponse.php 
- CacheableSecuredRedirectResponse.php in core/lib/ Drupal/ Core/ Routing/ CacheableSecuredRedirectResponse.php 
- CacheableTestResponse.php in core/modules/ system/ tests/ modules/ early_rendering_controller_test/ src/ CacheableTestResponse.php 
- HtmlResponse.php in core/lib/ Drupal/ Core/ Render/ HtmlResponse.php 
- ResourceResponse.php in core/modules/ rest/ src/ ResourceResponse.php 
- SectionComponentBuildRenderArrayEvent.php in core/modules/ layout_builder/ src/ Event/ SectionComponentBuildRenderArrayEvent.php 
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