code: public void setRowClass(String rowClass) {
          if("".equals(rowClass))
              return;
          _trState = new TrTag.State();
          _trState.styleClass = rowClass;
      }
docs: Set the HTML style class that is rendered on each HTML table row that
  is opened by this tag.  For example, if the row class is "rowClass",
  each opening table row tag is:
  <pre>
  &lt;tr class="rowClass"&gt;
  </pre>
  
  @param rowClass the name of a style class in the CSS
  @jsptagref.attributedescription
  Set the HTML style class that is rendered on each HTML table row that
  is opened by this tag.  For example, if the row class is "rowClass",
  each opening table row tag is:
  <pre>
  &lt;tr class="rowClass"&gt;
  </pre>
  @jsptagref.attributesyntaxvalue <i>string_class</i>
  @netui:attribute required="false"