How to update parrent form current form

We have form1 - parent form and form2 - child form, which opens from form1.
If you want do autoRefresh form1, you should use this code:

This code must be populated on Close() method form2

if(element.args().caller() is FormRun && element.args().caller().name() == formStr(Form1))

    {

        formRun = element.args().caller();

        if(formRun)

        {

            formRun.task(#taskF5);

        }

    }