code: public void doTag()
              throws JspException
      {
          if (hasErrors()) {
              reportErrors();
              return;
          }
  
          JspTag tag = SimpleTagSupport.findAncestorWithClass(this, IBehaviorConsumer.class);
          if (tag == null) {
              String s = Bundle.getString("Tags_BehaviorInvalidParent");
              registerTagError(s, null);
              reportErrors();
              return;
          }
  
          IBehaviorConsumer ac = (IBehaviorConsumer) tag;
          ac.setBehavior(_name, _value, _facet);
          return;
      }
docs: Add the name/value pair to the IBehaviorConsumer parent of the tag.
  @throws JspException if a JSP exception has occurred