如何获取FlutterWindow的GLFW窗口Id

import 'dart:ffi';
import 'package:ffi/ffi.dart';
import 'package:flutter/services.dart';

typedef glfwGetWin32WindowFunc = IntPtr Function(IntPtr glfwWindow);
typedef GLFWGetWin32Window = int Function(int glfwWindow);

class GLFW {
  static final DynamicLibrary _glfw = DynamicLibrary.open('glfw3.dll');
  static final GLFWGetWin32Window glfwGetWin32Window =
      _glfw.lookupFunction<glfwGetWin32WindowFunc, GLFWGetWin32Window>(
          'glfwGetWin32Window');
}

int getGLFWWindowId() {
  final binding = WidgetsBinding.instance;
  final window = binding.renderView;
  final glfwWindow = window.platformViewRegistry
      .getViewForRenderObject(window.renderView)
      .surface
      .context
      .getNativeHandle();

  final glfwWin32Window = GLFW.glfwGetWin32Window(glfwWindow.address);

  return glfwWin32Window;
}