whole_func_string: function onCallback(){
        exports.push(layui[item]);
        apps.length > 1 ?
          that.use(apps.slice(1), callback, exports)
        : ( typeof callback === 'function' && callback.apply(layui, exports) );
      }
func_code_string: function onCallback(){
        exports.push(layui[item]);
        apps.length > 1 ?
          that.use(apps.slice(1), callback, exports)
        : ( typeof callback === 'function' && callback.apply(layui, exports) );
      }
func_documentation_string: 回调