docs: @Override
    public final void setItsId(final BuyerPriceCategoryId pItsId) {
      this.itsId = pItsId;
      if (this.itsId != null) {
        this.priceCategory = this.itsId.getPriceCategory();
        this.buyer = this.itsId.getBuyer();
      } else {
        this.priceCategory = null;
        this.buyer = null;
      }
    }