public boolean isDisabled() {
        return disabled;
    }
Returns whether this user group has been disabled. Memberships of
disabled user groups are treated as non-existent, effectively disabling
membership in that group.

@return
    true if this user group is disabled, false otherwise.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/usergroup/UserGroupModel.java