group_id conflicts with keyword

Hi, hackers, I'm a database(postgresql variant) developer and we're considering to port pg_auto_failover for our database. The `group_id` is defined to be a keyword for a long time, which conflicts with the parameter in some functions. We can't change the keyword in our database.
Besides we maintain a new variant of pg_auto_failover, is it possible to change the parameter name `group_id` to another name? Like, `groupid`?