/*        PROBLEM AREA */

    public int mapGid(int obj_id)
    {
	return 0;   /* should return the group id to which object obj_id is associated */
    }


    /* ----------------------------------------------------------------- */


    /*   method commented by jekkin
public AbstractSet mapGidtoSet(int obj_id)

    {
       	AbstractSet abs = new AbstractSet();  // should return all elements of the group 

	abs.add(new Integer(1));
	abs.add(new Integer(2));
	abs.add(new Integer(3));
	return abs; 

    }

*/