showRemoveCard(indexOfCardInHand) {
    let showDuration = 0.0;

    if (indexOfCardInHand != null) {
      const cardNode = this.cardNodes[indexOfCardInHand];
      if (cardNode instanceof BottomDeckCardNode && cardNode.getSdkCard() != null) {
        showDuration = cardNode.showRemove();
      }
    }

    return showDuration;
  }
Shows animation for a card being removed from hand at index.
@param {Number} indexOfCardInHand