public synchronized void delete() {
   if (swigCPtr != 0) {
     if (swigCMemOwn) {
       swigCMemOwn = false;
       CGAL_Triangulation_2JNI.delete_Constrained_Delaunay_triangulation_2_Edge_circulator(
           swigCPtr);
     }
     swigCPtr = 0;
   }
 }