code: @Override
    public final void setItsId(final SeSrCaId pItsId) {
      this.itsId = pItsId;
      if (this.itsId != null) {
        this.itsCatalog = this.itsId.getItsCatalog();
        setItem(this.itsId.getItem());
      } else {
        this.itsCatalog = null;
        setItem(null);
      }
    }
docs: <p>Usually it's simple setter for model ID.</p>
  @param pItsId model ID