Setting Icon of an IContentPane?

Content

Looks like IContentPane does not support setting an icon. I tried setIcon and addIcon, neither works:

IContentPaneContext.createContentPane().then(function(IContentPane)

{

IContentPane.setName('News | Noteboard');

IContentPane.setContentUrl('./noodbord.html');

 

                    var icon = IContentPane.createIcon("font awesome");

                    icon.setIconClass("fas fa-bullhorn");

                    IContentPane.addIcon(icon);

});

 

Any thoughts on how to change the icon of a IContentPane?

Regards,

Nika.