protected static FormState::setAnyErrors($errors = TRUE)
Sets the global status of errors.
bool $errors: TRUE if any form has any errors, FALSE otherwise.
protected static function setAnyErrors($errors = TRUE) { static::$anyErrors = $errors; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Form!FormState.php/function/FormState::setAnyErrors/8.1.x