BannerRequestCompletionListener

/**
 * Listener called when the banner request finishes.
 */
interface BannerRequestCompletionListener {
    /**
     * Called when the banner request is finished.
     * @param layout Banner layout if request succeeded, null otherwise.
     * @param error If request fails error indicating the cause of failure, null for successful requests.
     */
    fun onRequestCompleted(layout: BannerPlacementLayout?, error: BannerRequestError?)
}