Wants to specify Cookie domain

Hello,

In order to restrict cookie for a particular domain, I would like to slightly change the script to specify cookie-domain.

From
ga('create', 'UA-XXXXX-Y', 'auto');

To
ga('create', 'UA-XXXXX-Y', {'cookieDomain': 'www.example.com'});

Manually, I know I can do. But is there any easy way?

Ref: (1)

Thanks & Regards,
Gulshan