code: public void setPersistenceClass(String persistenceClass) throws Exception {
          this.persistenceClass = persistenceClass;
          if (persistenceClass != null) {
              store = PersistenceUtils.getPersistenceStore(this, persistenceClass);
          }
      }
docs: Set scope persistence class
  
  @param persistenceClass
  Scope's persistence class
  @throws Exception
  Exception