code: public void setHideDisabled(final boolean hideDisabled) {
          if (hideDisabled)
              attrMixin.setAttribute(HIDE_DISABLED, Boolean.toString(true));
          else
              attrMixin.removeAttribute(HIDE_DISABLED);
      }
docs: Removes disabled options and optgroups from the menu<br>
  <br>
  Defaults to <code>false</code>.
  
  @param hideDisabled