TMS320C28341: How to set the "Radio button" option value from DSS javaScript

I had a look at the debugSession.flash.options  class.

There is possibility to set a Boolean, a String and Numeric value.

When I get the complete list of options we can find "Radio Button" as well.

e.g.

Radio Button Option:

    id: FlashOperations

    name: TMS320C28XX.F28335 Flash Settings.Flash Program Setting:

    value: Erase, Program, Verify

    choices:

        Erase, Program, Verify

        Program, Verify

        Load RAM Only

        Verify Only

How to set the "Radio button" option value ?

How to set  the value to "Program, Verify" ?

Thanks for your advices

/Richard