public static void RemoveOnAdAvailabilityChangeMethod(AdColony.AdAvailabilityChangeDelegate onAdAvailabilityChange)
{
AdColony.OnAdAvailabilityChange -= onAdAvailabilityChange;
}
//-----------------
public static void AddOnAdAvailabilityChangeMethod(AdColony.AdAvailabilityChangeDelegate onAdAvailabilityChange)
{
AdColony.OnAdAvailabilityChange += onAdAvailabilityChange;
}