public function extractSoapClientOptions()
{
return array_intersect_key($this->copy(), array_flip(['location', 'uri', 'style', 'use', 'soap_version', 'proxy_host', 'proxy_port', 'proxy_login', 'proxy_password', 'local_cert', 'passphrase', 'authentication', 'compression', 'encoding', 'trace', 'classmap', 'exceptions', 'connection_timeout', 'typemap', 'cache_wsdl', 'user_agent', 'stream_context', 'features', 'keep_alive', 'ssl_method']));
}