protected FormBase::configFactory()
Gets the config factory for this form.
When accessing configuration values, use $this->config(). Only use this when the config factory needs to be manipulated directly.
\Drupal\Core\Config\ConfigFactoryInterface
protected function configFactory() { if (!$this->configFactory) { $this->configFactory = $this->container()->get('config.factory'); } return $this->configFactory; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Form!FormBase.php/function/FormBase::configFactory/8.1.x