Headline parameters with graphic selection

Hi guys. I hope you are all well. I am just wondering if this is possible. I have a headline that i have exported as a component and i have added some parameter code as i want my users to be able to change the title, add a url (this will be used for a link to files) and also i want them to be able to choose the graphic too. I have attached a screenshot of my json and screen. The json i have only lets them change the text for the graphic but it doesnt do anything and it would be nice for them to use the icon chooser. Hopefully this makes sense.

Hopefully there is a way.

Thanks all

Chris