Blame for flet_extensions.py

import flet as ft
from js_execution import js_execution_router


async def eval_js(self: ft.Page, js_code: str) -> str:
    async with js_execution_router.create_dynamic_endpoint(js_code) as context:
        self.launch_url(context.endpoint, web_window_name=context.hidden_iframe_name)
        return await context.result_future
        
def extend_flet_page():

    if not hasattr(ft.Page, 'eval_js'):
        ft.Page.eval_js = eval_js