helper.atomicChangeObjectColor(object, gcColor, GC_WHITE);
if (gcColor != GC_YELLOW) { helper.atomicChangeObjectColor(object, gcColor, GC_WHITE); }
	public boolean visit(Object object) {		final int gcColor = helper.getObjectColor(object);		helper.atomicChangeObjectColor(object, gcColor, GC_WHITE);		return true;	}