GET FORMRUN FROM FORMDATASOURCE IN D365

GET FORMRUN FROM FORMDATASOURCE   IN D365 

Get FormRun from form datasource
[FormDataSourceEventHandler(formDataSourceStr(MyForm, MyRandomTableDS), FormDataSourceEventType::Written)]
public static void MyRandomTableDS_OnWritten(FormDataSource sender, FormDataSourceEventArgs e)
{
    FormRun formRun = sender.formRun() as FormRun;
    // you can even call custom methods (I think IntelliSense won't work though)
    formRun.myCustomMethod();
}