docs: protected void doTag(Writer out) throws JspException, IOException {
  		JspFragment body = getJspBody();
  		if(body!=null) {
  			// Check for JspWriter to avoid a JspWriter wrapping a JspWriter
  			body.invoke(
  				(out instanceof JspWriter)
  				? null
  				: out
  			);
  		}
  	}