Patch for _get tag to be able to return default body content

[dunsun]

Current _get tag does not accept body closure as a default content. Please could you modify this tag or add new _getDefault tag according to my solution ?

Current ORIGINAL _get tag:
public static void _get(Map args, Closure body, PrintWriter out, ExecutableTemplate template, int fromLine) {
        Object name = args.get("arg");
        if (name == null) {
            throw new TemplateExecutionException(template.template, fromLine, "Specify a variable name", new TagInternalException("Specify a variable name"));
        }
        Object value = Template.layoutData.get().get(name);
        if (value != null) {
            out.print(Template.layoutData.get().get(name));
        }
}

My MODIFIED _get tag:
public static void _getDefalt(Map args, Closure body, PrintWriter out, ExecutableTemplate template, int fromLine) {
        Object name = args.get("arg");
        if (name == null) {
            throw new TemplateExecutionException(template.template, fromLine, "Specify a variable name", new TagInternalException("Specify a variable name"));
        }
        Object value = Template.layoutData.get().get(name);
        if (value != null) {

            // MODIFICATION
            String strOut = Template.layoutData.get().get(name);
            // nothing was retrieved via get -> print a default body
            if(!(strOut != null && strOut.length() > 0)) {
               strOut = JavaExtensions.toString(body);
            }
            out.print(strOut);
        }
}