appium-flutter-driver/lib/commands/screen.ts

Appium Flutter driver

import type { FlutterDriver } from '../driver';
import { IsolateSocket } from '../sessions/isolate_socket';

export const getScreenshot = async function(this: FlutterDriver) {
  const response = await (this.socket as IsolateSocket).call(`_flutter.screenshot`) as any;
  return response.screenshot;
};