public void setExtensionManager(ExtensionManager extensionManager) {
extensionManager.addExtension(this);
}
private Draw buildTreeDrawSphere(Geometry geometry) {
MapTileTree mtt = new MapTileTree();
mtt.addMapTreeChangeListener(this);
MapTileTreeNode rootNode = mtt.getRootNode();
GeometryMapTree gmt = (GeometryMapTree) geometry;
URL source = gmt.getSource();
MapTileTreeNodeCore newCore;