private void modify(StoragePort port,String portNetworkId){
  port.setPortNetworkId(portNetworkId);
  dbClient.persistObject(port);
  modifiedStoragePortsList.add(port);
}

private void modify ( StoragePort port , String portNetworkId ) { port . setPortNetworkId ( portNetworkId ) ; dbClient . persistObject ( port ) ; modifiedStoragePortsList . add ( port ) ; }
modify the port with new port network id .
