public void RemoveCallback()
        {
            if (_callback == null)
            {
                Debug.LogWarning("InBrain Android callback wasn't set");
                return;
            }

            InBrainInst?.Call(Constants.RemoveCallbackJavaMethod, _callback);

            _callback = null;
        }
        public void AddCallback(Action <List <InBrainReward> > onRewardsReceived, Action onRewardsViewDismissed, bool confirmRewardsAutomatically = false)
        {
            _callback = new InBrainCallbackProxy(onRewardsViewDismissed, onRewardsReceived, confirmRewardsAutomatically);

            JniUtils.RunOnUiThread(() => { InBrainInst?.Call(Constants.AddCallbackJavaMethod, _callback); });
        }