Method on

packages/widget-sdk/src/message/widget_message.ts:36–38

* Messages in the widget, will only communicate with the main thread and will only accept messages from the main thread, * so simplify the parameters here. * @param type * @param callback

(type: MessageType, callback: (data: IResponse<any>) => void)

   * @param callback 
   */
  private on(type: MessageType, callback: (data: IResponse<any>) => void) {
    return this.messageBridge.on(type, callback, this.origin, this.target);
  }

  /**
   * Messages in the widget, will only communicate with the main thread and