private function createRequest($type, $method = null, $arguments = null, Headers $headers = null)
{
$request = new Request();
$request->setType($type);
$requestHeaders = $this->defaultHeaders ? clone $this->defaultHeaders : new Headers();
if ($headers) {
$requestHeaders->merge($headers);
}
$request->setHeaders($requestHeaders);
if ($method) {
$contentType = $requestHeaders->get('content-type');
$arguments = $this->serializer->serializeArguments($method, $arguments, $contentType);
$request->setMethodName($method)->setArgumentsBody($arguments);
}
return $request;
}
