clickAd

Report a click on the ad currently on screen and emit the public adclick event carrying the asset's declared interaction.clickThrough URL (if any). Called by the renderer on a viewer tap, or programmatically by the application (e.g. a custom "visit advertiser" button). The SDK deliberately does NOT open the URL — that is the application's decision. Returns the clickThrough URL when a click was registered, null otherwise. Mirrors the web/iOS clickAd().