code: public function sendRequest(Request $request)
  	{
  		$this->prepareRequest($request);
  
  		$result = curl_exec($this->ch);
  
  		if ($result === false) {
  			throw new \RuntimeException("cURL request failed with error: " . curl_error($this->ch));
  		}
  
  		$response = $this->createResponseObject($result);
  
  		curl_close($this->ch);
  
  		return $response;
  	}
docs: Send a request.
  
  @param  Request $request
  
  @return Response