/**
* Interpret the given method and arguments to a SOAP request message.
*
* @param string $function_name The name of the SOAP function to interpret.
* @param array $arguments An array of the arguments to $function_name.
* @param array $options An associative array of options.
* The location option is the URL of the remote Web service.
* The uri option is the target namespace of the SOAP service.
* The soapaction option is the action to call.
* @param mixed $input_headers An array of headers to be interpreted along with the SOAP request.
* @return SoapRequest
*/
public function request($function_name, array $arguments = [], array $options = null, $input_headers = null)
{
return $this->soap->request($function_name, $arguments, $options, $input_headers);
}
