bindHandUsability() {
    const cardNodes = this.getCardNodes();
    for (let i = 0, il = cardNodes.length; i < il; i++) {
      cardNodes[i].updateUsability();
    }
  }
Binds the usability of the hand from the current deck as set in the model (SDK layer). Immediately will update all cards to show mana cost and whether can be used.