@Override
    protected ObjectRelationMapper<UserGroupModel> getObjectRelationMapper() {
        return userGroupParentUserGroupMapper;
    }
The server environment for retrieving configuration.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/usergroup/UserGroupParentUserGroupSet.java