docs: function artery(pw, iv, meds) {
      if (!iv.artery) iv.artery = new Artery();
      plet.props(iv.artery, sprops, meds || iv, true);
      iv.artery.count = iv.count;
      iv.artery.data = iv.data;
      iv.artery.passes = iv.passes;
      iv.artery.pass = iv.pass;
      return iv.artery;
  }