$this->serviceClass->registerFunction(
            'lat_save_checkout',
            array('session' => 'xsd:string','module_name' => 'xsd:string', 'record_id' => 'xsd:string','parent_id' => 'xsd:string','sub_module_name' => 'xsd:string','name_value_list' => 'xsd:string'),
            array('return' => 'xsd:string')
        );