stopShowingPlayCard(sdkCard, animateDuration) {
    const currentSdkCard = this._playCardNode.getSdkCard();
    sdkCard || (sdkCard = currentSdkCard);
    if (currentSdkCard != null && currentSdkCard === sdkCard) {
      this._playCardNode.stopShowingPlay(animateDuration);

      this.getEventBus().trigger(EVENTS.play_card_stop, { type: EVENTS.play_card_stop, card: sdkCard });
    }
  }
Stops showing the card being played, or optionally only stop showing if the card being played is the card passed in.
@param {SDK.Card} [sdkCard=currently shown card]
@param {Number} animateDuration duration of animation in seconds