protected ReferenceVariable tempLocalVariableImpl(SootMethod method) {
   return pag.makeLocalVarNode(
       new Pair("TempVar", new Integer(++G.v().SparkNativeHelper_tempVar)),
       RefType.v("java.lang.Object"),
       method);
 }
 protected ReferenceVariable tempFieldImpl(String fieldsig) {
   return pag.makeGlobalVarNode(new Pair("tempField", fieldsig), RefType.v("java.lang.Object"));
 }
 protected ReferenceVariable tempVariableImpl() {
   return pag.makeGlobalVarNode(
       new Pair("TempVar", new Integer(++G.v().SparkNativeHelper_tempVar)),
       RefType.v("java.lang.Object"));
 }
 protected ReferenceVariable staticFieldImpl(String className, String fieldName) {
   SootClass c = RefType.v(className).getSootClass();
   SootField f = c.getFieldByName(fieldName);
   return pag.makeGlobalVarNode(f, f.getType());
 }