public Object[] getObjectsById(boolean validate, Object... oids) {
   checkStatus();
   return pm.getObjectsById(validate, oids);
 }
 public Object[] getObjectsById(Object[] oids, boolean validate) {
   checkStatus();
   return pm.getObjectsById(validate, oids);
 }
 public Object[] getObjectsById(Object... oids) {
   checkStatus();
   return pm.getObjectsById(oids);
 }
 public Collection getObjectsById(Collection oids, boolean validate) {
   checkStatus();
   return pm.getObjectsById(oids, validate);
 }
 public Collection getObjectsById(Collection oids) {
   checkStatus();
   return pm.getObjectsById(oids);
 }