private function _convertListInventorySupplyByNextToken($request) {

        $parameters = array();
        $parameters['Action'] = 'ListInventorySupplyByNextToken';
        if ($request->isSetSellerId()) {
            $parameters['SellerId'] =  $request->getSellerId();
        }
        if ($request->isSetMWSAuthToken()) {
            $parameters['MWSAuthToken'] =  $request->getMWSAuthToken();
        }
        if ($request->isSetMarketplace()) {
            $parameters['Marketplace'] =  $request->getMarketplace();
        }
        if ($request->isSetSupplyRegion()) {
            $parameters['SupplyRegion'] =  $request->getSupplyRegion();
        }
        if ($request->isSetNextToken()) {
            $parameters['NextToken'] =  $request->getNextToken();
        }

        return $parameters;
    }