The source code

    /**
     * @ignore
     *  single tab panel.
     * @author yiminghe@gmail.com
     */
    KISSY.add("tabs/panel", function (S, Component, PanelRender) {

        /**
         * KISSY.Tabs.Panel
         * @class  KISSY.Tabs.Panel
         * @extends KISSY.Component.Controller
         */
        return Component.Controller.extend({

        }, {
            ATTRS: {
                /**
                 * whether selected
                 * @cfg {Boolean} selected
                 */
                /**
                 * @ignore
                 */
                selected: {
                    view: 1
                },
                focusable: {
                    value: false
                },
                allowTextSelection: {
                    value: true
                },
                selectedCls: {
                    view: 1
                },
                xrender: {
                    value: PanelRender
                }
            }
        }, {
            xclass: 'tabs-panel'
        })

    }, {
        requires: ['component/base', './panel-render']
    });