get __currencyDisplayNode() {
    const node = /** @type {HTMLElement[]} */ (Array.from(this.children)).find(
      child => child.slot === this._currencyDisplayNodeSlot,
    );
    if (node) {
      this.__storedCurrencyDisplayNode = node;
    }

    return node || this.__storedCurrencyDisplayNode;
  }
@returns {HTMLElement | undefined} the current currency display node
@private