#vulnerable code 
                                public AppiumServiceBuilder getAppiumServiceBuilder(String methodName) throws Exception {
        if (iosDevice.checkiOSDevice(device_udid)) {
            String webKitPort = iosDevice.startIOSWebKit(device_udid);
            return appiumMan.appiumServerForIOS(device_udid, methodName, webKitPort);
        } else if (!iosDevice.checkiOSDevice(device_udid)) {
            return appiumMan.appiumServerForAndroid(device_udid, methodName);
        }
        return null;
    } 
                            #location 5 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public AppiumServiceBuilder getAppiumServiceBuilder(String methodName) throws Exception {
        String webKitPort = iosDevice.startIOSWebKit(device_udid);
        return appiumMan.appiumServerForIOS(device_udid, methodName, webKitPort);
    }