Set listbox multiple selection to false in script editor

Hi experts

I have a DS dashboard that include a listbox with the setting "multiple selection" set to true. But in some scenarios I would like to change this setting to false. I have not been able to find the command to change this setting in the script editor. What i want to write is something like "LISTBOX_1.setMultipleSelection(false);" but this is not a valid command. Is there another way to write this or do I actually need to create another listbox that I show and then hide the multiple selection listbox?

We use the newest version and patch of DS.

Kind regards

Erik