How can I call on a list of users from a specific Role Scoper group?

How are a user’s Role Scoper group assignments stored? As user meta? In separate tables? I want to be able to call on a list of users assigned to a specific Role Scoper role group, maybe using:

—
<?php get_users( $args ); ?>
<?php
$blogusers = get_users(‘meta=……?
—-

how could this be done (assuming it can) if, for instance, I want to list users that have been assigned to the Role Scoper group “Group 1”?

http://wordpress.org/extend/plugins/role-scoper/