How to 'disconnect' in JCoDestination API

Hello,

I am using following piece of code to make a RFC call from a JSPDynpage to back-end SAP R/3 system: -

JCoDestination wdModelDataDest = JCoDestinationManager.getDestination("WD_MODELDATA_MYAPPLICATION");

JCoRepository repository = wdModelDataDestFixedUser.getRepository();

JCoFunction function = repository.getFunction(RFC_NAME);

JCoParameterList importparams = function.getImportParameterList();

importparams.setValue("USERNAME", "A007");

function.execute(wdModelDataDest);

JCoParameterList exportParams = function.getExportParameterList();

String gbuName = exportParams.getString("GBU");

Could you please let me know how to ensure that connection is 'disconnected' after RFC call?

Portal version : CE7.3 EHP1 SP9

Thanks & Regards,

Amey Mogare