11 files declare their use of RequestContext
- IFrameUrlHelper.php in core/
modules/ media/ src/ IFrameUrlHelper.php  - IFrameUrlHelperTest.php in core/
modules/ media/ tests/ src/ Unit/ IFrameUrlHelperTest.php  - PathBasedBreadcrumbBuilder.php in core/
modules/ system/ src/ PathBasedBreadcrumbBuilder.php  - PathValidator.php in core/
lib/ Drupal/ Core/ Path/ PathValidator.php  - PathValidatorTest.php in core/
tests/ Drupal/ KernelTests/ Core/ Path/ PathValidatorTest.php  - RedirectResponseSubscriber.php in core/
lib/ Drupal/ Core/ EventSubscriber/ RedirectResponseSubscriber.php  - RouterTest.php in core/
tests/ Drupal/ Tests/ Core/ Routing/ RouterTest.php  - SiteInformationForm.php in core/
modules/ system/ src/ Form/ SiteInformationForm.php  - TrustedRedirectResponseTest.php in core/
tests/ Drupal/ Tests/ Core/ Routing/ TrustedRedirectResponseTest.php  - UrlGeneratorTest.php in core/
tests/ Drupal/ Tests/ Core/ Routing/ UrlGeneratorTest.php  - UserAuthTest.php in core/
modules/ user/ tests/ src/ Unit/ UserAuthTest.php  
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