Collection<Long> c = memberOfGroupsHolder.get();
Collection<Long> c = data.get().memberOfGroups;
    public static Collection<Long> getMemberOfGroups( )    {		Collection<Long> c = memberOfGroupsHolder.get();    	    	if ( c == null || c.size() == 0 )    	{    		c = Collections.singletonList(Long.MIN_VALUE); // FIXME hack as well.    	}    	return c;    }