private static extern void UnionPlatform_RewardVideoAd_Load( string slotID, string userID, RewardVideoAd_OnError onError, RewardVideoAd_OnRewardVideoAdLoad onRewardVideoAdLoad, RewardVideoAd_OnRewardVideoCached onRewardVideoCached, int context);
private static extern void UnionPlatform_RewardVideoAd_Load( string slotID, string userID, string rewardName, int rewardAmount, string mediaExtxa, RewardVideoAd_OnError onError, RewardVideoAd_OnRewardVideoAdLoad onRewardVideoAdLoad, RewardVideoAd_OnRewardVideoCached onRewardVideoCached, int context);