HarmonyOS h5与原生交互， 在原生实现的js方法中怎么获取到webController，用于调用runJavaScript方法？

// javaScriptProxy对象  
public get javaScriptProxy() {  
    return {  
        object: {  
            call: this.call  
        },  
        name: "JSBridgeHandle",  
        methodList: ['call'],  
        controller: this.controller,  
    }  
} 
// 使用Web组件加载H5页面  
@Component  
struct JsProxy {  
  private controller: WebviewController = new WebView.WebviewController()  
  private jsBridge: JSBridge = new JSBridge(this.controller)  
  build() {  
    Column(){  
      Web({ src: $rawfile('index.html'), controller: this.controller })  
        .javaScriptProxy(this.jsBridge.javaScriptProxy)  
        .onPageBegin(() => {  
          this.jsBridge.initJSBridge()  
        })  
    }  
  }  
}

// bridgeKey与bridgeMethod动态生成H5侧调用的入口  
bridgeKey: string = 'JSBridge'  
bridgeMethod: string = 'call'  
// 初始化脚本注入H5侧  
public initJSBridge() {  
    try {  
        this.controller.runJavaScript(`  
            // 接收原生侧结果，执行callback  
            function JSBridgeCallback(id, params){  
                window.JSBridgeMap[id](params)  
            };  
            // 声明调用入口  
            window.${this.bridgeKey} = {  
                ${this.bridgeMethod}(method, params, callback){  
                    window.JSBridgeMap[id] = callback || (() => {});  
                    JSBridgeHandle.call(method, JSON.stringify(paramsObj));  
                },  
            }`)  
    }  
}

// call方法调用原生侧方法，接收结果  
private call = (fun, params) => {  
    try {  
        const paramsObj = JSON.parse(params)  
        const events = this.exposeManage.methodMap.get(fun)  
        const results = []  
        events.forEach(callFun => {  
            results.push(callFun(paramsObj.data))  
        })  
        Promise.all(results.filter(i => !!i)).then(res => {  
            this.callback(paramsObj.callID, res.length > 1 ? res : res[0])  
        })  
    }  
}  
  
// 通过runJavaScript调用JSBridgeCallback执行回调  
private callback(id, data) {  
    this.controller.runJavaScript(`__JSBridgeCallback__("${id}", ${JSON.stringify(data)})`);  
}