BUI: Get chat fields in Interaction workspace

Content

Hello All,

I have created one BUI for interaction workspace, what i want is i have get chatid and after the record was save/close i have get the chat incident and contactid.

ORACLE_SERVICE_CLOUD.extension_loader.load(appName , appVersion)
.then(function(extensionProvider)
{
    extensionProvider.registerWorkspaceExtension(function(WorkspaceRecord)
        {    
            WorkspaceRecord.addRecordSavedListener(Saveincidentattachment);
        }
    );
});

function Saveincidentattachment(parameter)
    {

//my work with incidentid and contactid

}