code: @Api
  	public void addCard(KEY_TYPE key, Canvas card) {
  		if (currentCard != null) {
  			currentCard.hide();
  		}
  		addMember(card);
  		currentCard = card;
  		cards.put(key, card);
  	}
docs: Add a card to the deck and associate it with the specified key.
  
  @param key key associated to the card
  @param card the card
  @since 1.0.0