protected void start(String element, Attributes atts) {
   super.start(element, atts);
   if (isGeometryElement(element)) {
     insertExtrudeTags();
   }
 }
 public void encode(Geometry g) {
   extrudeEnabled = inspectGeometry(g);
   super.encode(g);
 }
 public void encode(Object o) {
   if (o instanceof Geometry) {
     extrudeEnabled = inspectGeometry((Geometry) o);
   }
   super.encode(o);
 }
 public void encode(Geometry g, String srsname) {
   extrudeEnabled = inspectGeometry(g);
   super.encode(g, srsname);
 }
 public void encode(Object o, String srsname) {
   if (o instanceof Geometry) {
     extrudeEnabled = inspectGeometry((Geometry) o);
   }
   super.encode(o, srsname);
 }