code: public void doTag()
              throws JspException
      {
          Object o = getParent();
          assert (o != null);
          if (!(o instanceof TreeItem)) {
              logger.error("Invalid Parent (expected a TreeItem):" + o.getClass().getName());
              return;
          }
  
          // assign the value to the parent's label value
          TreeItem ti = (TreeItem) o;
          ti.setItemInheritableState(_iState);
      }
docs: Render this Tree control.
  @throws JspException if a processing error occurs