OMGraphicList omgl = (OMGraphicList) get(key);
FeatureCacheGraphicList omgl = (FeatureCacheGraphicList) get(key);
    protected void addToCachedList(OMGraphic omg, String featureType, PrimitiveTable pt) {        String key = createTableCacheKey(featureType, pt.getTileDirectory().getPath());        OMGraphicList omgl = (OMGraphicList) get(key);        omgl.add(omg);    }