The source code

    /**
     * include command
     * @author yiminghe@gmail.com
     * @ignore
     */
    KISSY.add('xtemplate/runtime/include-command', function (S, XTemplateRuntime) {

        var include = {

            invokeEngine: function (tpl, scopes, option) {
                return new XTemplateRuntime(tpl, S.merge(option)).render(scopes);
            },

            include: function (scopes, option) {
                var params = option.params;
                if (!params || params.length != 1) {
                    error('include must has one param');
                }
                var param0 = params[0], tpl;
                var subTpls = option.subTpls;
                if (!(tpl = subTpls[param0])) {
                    error('does not include sub template "' + param0 + '"');
                }
                // template file name
                option.name = param0;
                return include.invokeEngine(tpl, scopes, option)
            }

        };

        return include;

    }, {
        requires: ['./base']
    });