addInterstitial abstract method
Adds a configuration to display an interstitial with r89ConfigId for the screen transition or
tap action.
eventToTrack is the target screen name navigating to will display an interstitial
with a given r89ConfigId
eventToTrackButton a button tag name clicking on will display an interstitial with a given r89ConfigId
Implementation
AdScreenConfig addInterstitial({
String? eventToTrack,
String? eventToTrackButton,
});