/**
         * Display price with discount applied if promotion is on. Otherwise display original price.
         */
        // [START display_price]
        private void DisplayPrice()
        {
            long initialPrice = mFirebaseRemoteConfig.GetLong(PRICE_CONFIG_KEY);
            long finalPrice   = initialPrice;

            if (mFirebaseRemoteConfig.GetBoolean(IS_PROMOTION_CONFIG_KEY))
            {
                // [START get_config_values]
                finalPrice = initialPrice - mFirebaseRemoteConfig.GetLong(DISCOUNT_CONFIG_KEY);
                // [END get_config_values]
            }
            mPriceTextView.SetText(PRICE_PREFIX_CONFIG_KEY + finalPrice, null);
        }
 public long GetLong(string key) => _firebaseRemote.GetLong(key);