/** Method to refresh all objects in the Persistence Manager. */
 public void refreshAll() {
   checkStatus();
   pm.refreshAll();
 }
 /**
  * Method to refresh a collection of objects.
  *
  * @param os Collection of objects to refresh
  */
 public void refreshAll(Collection os) {
   checkStatus();
   pm.refreshAll(os);
 }
 /**
  * Method to refresh objects that failed verification in a JDOException
  *
  * @param exc Exception containing objects that failed verification
  */
 public void refreshAll(JDOException exc) {
   checkStatus();
   pm.refreshAll(exc);
 }
 /**
  * Method to refresh an array of objects.
  *
  * @param os Array of objects to refresh
  */
 public void refreshAll(Object... os) {
   checkStatus();
   pm.refreshAll(os);
 }