code: @Override
    public final void setItsId(final WarehouseRestId pItsId) {
      this.itsId = pItsId;
      if (this.itsId != null) {
        this.invItem = this.itsId.getInvItem();
        this.warehouseSite = this.itsId.getWarehouseSite();
        this.unitOfMeasure = this.itsId.getUnitOfMeasure();
      } else {
        this.invItem = null;
        this.warehouseSite = null;
        this.unitOfMeasure = null;
      }
    }
docs: <p>Setter for itsId.</p>
  @param pItsId reference