onreadystatechange:function(xhr,event){
    console.log("onreadystatechange called: %O")
    //返回false表示不阻断，拦截函数执行完后会接着执行真正的xhr.onreadystatechange回调.
    //返回true则表示阻断，拦截函数执行完后将不会执行xhr.onreadystatechange. 
    return false
  },

ah.proxy({
            onRequest: (config, handler) => {
                 if(config.url == 'xxxxxxxx'){
                        // handler.bypass()??
                  }
                  // handler.next(config)
            },
             ...
})