src/Core/Http/Serialization/JsonObjectSerializer.php
public function Serialize($entity)
    {
        $this->collectResourceURL($entity);
        $arrayObj = $this->customerConvertObjectToArray($entity);
        $array = $this->removeNullProperties($arrayObj);
        return $this->checkResult(json_encode($array, true));
    }
public function Serialize($entity)
    {
        $this->collectResourceURL($entity);
        $arrayObj = $this->customerConvertObjectToArray($entity);
        $array = $this->removeNullProperties($arrayObj);
        return $this->checkResult(json_encode($array, true));
    }
Serializes the specified entity.
@param object entity The entity
@return string Returns the serialize entity in string format.