/** Persist the throttle data to a SimpleFieldSet. */
 SimpleFieldSet persistToFieldSet() {
   SimpleFieldSet fs = new SimpleFieldSet(false);
   fs.put("ThrottleWindow", throttleWindowBulk.exportFieldSet(false));
   fs.put("ThrottleWindowRT", throttleWindowRT.exportFieldSet(false));
   fs.put("ThrottleWindowCHK", throttleWindowCHK.exportFieldSet(false));
   fs.put("ThrottleWindowSSK", throttleWindowCHK.exportFieldSet(false));
   fs.put("CHKRequestThrottle", chkRequestThrottleBulk.exportFieldSet());
   fs.put("SSKRequestThrottle", sskRequestThrottleBulk.exportFieldSet());
   fs.put("CHKInsertThrottle", chkInsertThrottleBulk.exportFieldSet());
   fs.put("SSKInsertThrottle", sskInsertThrottleBulk.exportFieldSet());
   fs.put("CHKRequestThrottleRT", chkRequestThrottleRT.exportFieldSet());
   fs.put("SSKRequestThrottleRT", sskRequestThrottleRT.exportFieldSet());
   fs.put("CHKInsertThrottleRT", chkInsertThrottleRT.exportFieldSet());
   fs.put("SSKInsertThrottleRT", sskInsertThrottleRT.exportFieldSet());
   return fs;
 }