public FormValidatorInterface::setInvalidTokenError(FormStateInterface $form_state)
Sets a form_token error on the given form state.
\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.
$this
public function setInvalidTokenError(FormStateInterface $form_state);
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Form!FormValidatorInterface.php/function/FormValidatorInterface::setInvalidTokenError/8.1.x