code: protected void invoke(JspFragment body, MediaValidator captureValidator) throws JspException, IOException {
  		body.invoke(captureValidator);
  	}
docs: Invokes the body.  This is only called when a body exists.  Subclasses may override this to perform
  actions before and/or after invoking the body.  Any overriding implementation should call
  super.invoke(JspFragment,MediaValidator) to invoke the body.