src/DataService/DataService.php
public function setupSerializers()
    {
        $this->responseSerializer = CoreHelper::GetSerializer($this->serviceContext, false);
        $this->requestSerializer = CoreHelper::GetSerializer($this->serviceContext, true);
    }
public function setupSerializers()
    {
        $this->responseSerializer = CoreHelper::GetSerializer($this->serviceContext, false);
        $this->requestSerializer = CoreHelper::GetSerializer($this->serviceContext, true);
    }
Setups serializers objects for responces and requests based on service context