code: private AFTPClient actionClose() throws PageException {
  	FTPConnection conn = _createConnection();
  	AFTPClient client = pool.remove(conn);
  
  	Struct cfftp = writeCfftp(client);
  	cfftp.setEL("succeeded", Caster.toBoolean(client != null));
  	return client;
      }
docs: close a existing ftp connection
  
  @return FTPCLient
  @throws PageException