private static SootClass getExceptionalUnitGraph(String className) {
   instantiateProject();
   SootClassLoader loader = SootClassLoader.instance();
   try {
     loader.process();
   } catch (Exception e) {
     e.printStackTrace();
   }
   return loader.getSootClass(className);
 }
  private static SootClass getExceptionalUnitGraph(String className, SootClassLoader loader) {
    System.out.println("class name: " + className);

    try {
      loader.process();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return loader.getSootClass(className);
  }