/**
  * Builds the controller context by extending
  * the Extbase context with custom additions.
  *
  * @return ControllerContext
  */
 protected function buildControllerContext()
 {
     $controllerContext = ControllerContext::extend(parent::buildControllerContext())->setConfiguration($this->configuration);
     $this->formBuilder->setControllerContext($controllerContext);
     return $controllerContext;
 }