code: public function getServiceStatus($request)
      {
          if (!($request instanceof MarketplaceWebServiceSellers_Model_GetServiceStatusRequest)) {
              $request = new MarketplaceWebServiceSellers_Model_GetServiceStatusRequest($request);
          }
          $parameters = $request->toQueryParameterArray();
          $parameters['Action'] = 'GetServiceStatus';
          $httpResponse = $this->_invoke($parameters);
  
          $response = MarketplaceWebServiceSellers_Model_GetServiceStatusResponse::fromXML($httpResponse['ResponseBody']);
          $response->setResponseHeaderMetadata($httpResponse['ResponseHeaderMetadata']);
          return $response;
      }
docs: Get Service Status
  Returns the service status of a particular MWS API section. The operation
  takes no input.
  All API sections within the API are required to implement this operation.
  
  @param mixed $request array of parameters for MarketplaceWebServiceSellers_Model_GetServiceStatus request or MarketplaceWebServiceSellers_Model_GetServiceStatus object itself
  @see MarketplaceWebServiceSellers_Model_GetServiceStatusRequest
  @return MarketplaceWebServiceSellers_Model_GetServiceStatusResponse
  
  @throws MarketplaceWebServiceSellers_Exception