bindCardBack() {
    // attempt to use this card's owner's card back
    let cardBackId;
    const ownerId = this.sdkCard && this.sdkCard.getOwnerId();
    const ownerSetupData = ownerId && SDK.GameSession.getInstance().getPlayerSetupDataForPlayerId(ownerId);
    if (ownerSetupData != null) {
      cardBackId = ownerSetupData.cardBackId;
    }

    // fallback to default card back
    if (!SDK.CosmeticsFactory.isIdentifierForCardBack(cardBackId)) {
      cardBackId = SDK.CosmeticsFactory.getDefaultCardBackIdentifier();
    }

    this.setCardBackId(cardBackId);
  }
Binds the card back based on the owner's chosen card back, or if no owner then the user's chosen card back.
NOTE: you should not need to call this method directly, as it is called automatically as needed.