6 methods override RequestPolicyInterface::check() in Drupal 9

AllowToolbarPath::check in core/modules/toolbar/src/PageCache/AllowToolbarPath.php

Determines whether delivery of a cached page should be attempted.

ChainRequestPolicy::check in core/lib/Drupal/Core/PageCache/ChainRequestPolicy.php

Determines whether delivery of a cached page should be attempted.

CommandLineOrUnsafeMethod::check in core/lib/Drupal/Core/PageCache/RequestPolicy/CommandLineOrUnsafeMethod.php

Determines whether delivery of a cached page should be attempted.

DenyTestAuthRequests::check in core/modules/rest/tests/modules/rest_test/src/PageCache/RequestPolicy/DenyTestAuthRequests.php

Determines whether delivery of a cached page should be attempted.

DisallowBasicAuthRequests::check in core/modules/basic_auth/src/PageCache/DisallowBasicAuthRequests.php

Determines whether delivery of a cached page should be attempted.

NoSessionOpen::check in core/lib/Drupal/Core/PageCache/RequestPolicy/NoSessionOpen.php

Determines whether delivery of a cached page should be attempted.