/** The 'refType' is known to match, return the EventRequest. */
 EventRequest resolveEventRequest(ReferenceType refType) throws NoSuchFieldException {
   Field field = refType.fieldByName(fieldId);
   EventRequestManager em = refType.virtualMachine().eventRequestManager();
   EventRequest wp = em.createAccessWatchpointRequest(field);
   wp.setSuspendPolicy(suspendPolicy);
   wp.enable();
   return wp;
 }