protected function _call(\Communique\RESTClientRequest $request, $debug = null) {
		foreach ($this->_interceptors as $request_interceptor) {
			$request = $request_interceptor->request($request);
		}
		$response = $this->_http->request($request);
		foreach ($this->_interceptors as $response_interceptor) {
			$response = $response_interceptor->response($response);
		}
		if ($debug) {
			$debug($request, $response);
		}
		return $response;
	}