Dominion.PlayerState.RequestPlayerGainCardFromSupply C# (CSharp) Method

        internal Card RequestPlayerGainCardFromSupply(GameState gameState, CardPredicate acceptableCard, string description, bool isOptional = false, DeckPlacement defaultLocation = DeckPlacement.Discard)
        {
            return RequestPlayerGainCardFromSupply(gameState, this, acceptableCard, description, isOptional, defaultLocation);
        }

        public override DeckPlacement DoSpecializedWhenGain(PlayerState currentPlayer, GameState gameState)
        {
            currentPlayer.RequestPlayerGainCardFromSupply(
                gameState,
                card => card.CurrentCoinCost(currentPlayer) < this.CurrentCoinCost(currentPlayer) && card.potionCost == 0,
                "Must gain a card costing less than this");

            return DeckPlacement.Default;
        }