Track the end of the WindowDragArea in flet

How can I track the end of the Window Drag Area in flet

from flet import *def main(page: Page):    page.window_title_bar_hidden = True    page.window_title_bar_buttons_hidden = True    page.window_height = 200    page.window_width = 300    page.window_resizable = False    page.window_center()    def end_window_drag(e):        pass    page.add(        Row(            [                WindowDragArea(                    Container(                        Text('Областьперетаскивания'),                        bgcolor=colors.AMBER_300,                        padding=10),                    expand=True,                    maximizable=False                ),                IconButton(icons.CLOSE, on_click=lambda _: page.window_close())            ]        )    )app(main)