eZ\Publish\Core\MVC\Symfony\View\ContentView::getContent PHP Method

    public function getContent()
    {
        return $this->content;
    }

 /**
  * @param ContentView $contentView
  * @param string $queryParameterValue
  *
  * @return mixed
  */
 private function evaluateExpression(ContentView $contentView, $queryParameterValue)
 {
     if (substr($queryParameterValue, 0, 2) === '@=') {
         $language = new ExpressionLanguage();
         return $language->evaluate(substr($queryParameterValue, 2), ['view' => $contentView, 'location' => $contentView->getLocation(), 'content' => $contentView->getContent()]);
     } else {
         return $queryParameterValue;
     }
 }