code: protected void fireBeforePersist() {
          PersistableListener l = _listener;
          
          if(l != null) {
              try {
                  l.beforePersist();
              } catch(Exception e) {
                  _log.error("failure on calling beforePersist", e);
              }
          }
      }
docs: Fire beforePersist events to the PersistableListener.