The CSRF token generator.
Type: \Drupal\Core\Access\CsrfTokenGenerator
protected $csrfToken;
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Licensed under the GNU General Public License, version 2 and later.
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Access!RouteProcessorCsrf.php/property/RouteProcessorCsrf::csrfToken/8.1.x