private function createOptions($config, $overrides = array())
    {
        return array_merge(array(
            'classmap' => require __DIR__."/includes/classmap.php",
            'trace' => 1,
            'connection_timeout' => 5,
            'cache_wsdl' => WSDL_CACHE_BOTH,
            'location' => $config['host']."/services/NetSuitePort_".$config['endpoint'],
            'keep_alive' => false,
            'features' => SOAP_SINGLE_ELEMENT_ARRAYS,
            'user_agent' => "PHP-SOAP/".phpversion()." + ryanwinchester/netsuite-php",
            'stream_context' => stream_context_create(
              array(
                'http' => array(
                  'protocol_version' => 1.1,
                  'header' => "Transfer-Encoding: chunked",
                ),
              )
            ),
        ), $overrides);
    }