Model/PageManager.php
public function getObjectBySerializeFormat($content, $format, $entity)
    {
        $page = $this->jmsSerializer->deserialize(
            $content,
            $entity,
            $format
        );
        return $page;
    }
public function getObjectBySerializeFormat($content, $format, $entity)
    {
        $page = $this->jmsSerializer->deserialize(
            $content,
            $entity,
            $format
        );
        return $page;
    }
//