code: function (element, containerTag) {
      if (element && element.hasChildNodes)
        for (var i = 0; i < element.childNodes.length; ++i)
          if (element.childNodes[i].tagName == containerTag)
            return element.childNodes[i];
    
      return null;
    }
docs: /* Finds the first element of the given tag type within a parent element.
  Used for finding the first LI[ST] within a L[IST]I[TEM].