How to use the imgui.end function in imgui

clicked_quit, selected_quit = imgui.menu_item(
                    "Quit", 'Cmd+Q', False, True
                )

                if clicked_quit:
                    exit(1)

                imgui.end_menu()
            imgui.end_main_menu_bar()

        imgui.show_test_window()

        imgui.begin("Custom window", True)
        imgui.text("Bar")
        imgui.text_colored("Eggs", 0.2, 1., 0.)
        imgui.end()

        gl.glClearColor(1., 1., 1., 1)
        gl.glClear(gl.GL_COLOR_BUFFER_BIT)

        imgui.render()
        impl.render(imgui.get_draw_data())
        glfw.swap_buffers(window)

    impl.shutdown()
    glfw.terminate()

clicked_quit, selected_quit = imgui.menu_item(
                    "Quit", 'Cmd+Q', False, True
                )

                if clicked_quit:
                    exit(1)

                imgui.end_menu()
            imgui.end_main_menu_bar()

        imgui.show_test_window()

        imgui.begin("Custom window", True)
        imgui.text("Bar")
        imgui.text_colored("Eggs", 0.2, 1., 0.)
        imgui.end()

        imgui.render()
        self.imgui.render(imgui.get_draw_data())

clicked_quit, selected_quit = imgui.menu_item(
                    "Quit", 'Cmd+Q', False, True
                )

                if clicked_quit:
                    exit(1)

                imgui.end_menu()
            imgui.end_main_menu_bar()

        imgui.show_test_window()

        imgui.begin("Custom window", True)
        imgui.text("Bar")
        imgui.text_colored("Eggs", 0.2, 1., 0.)
        imgui.end()

        gl.glClearColor(1., 1., 1., 1)
        gl.glClear(gl.GL_COLOR_BUFFER_BIT)

        imgui.render()

        SDL_GL_SwapWindow(window)

    renderer.shutdown()
    SDL_GL_DeleteContext(gl_context)
    SDL_DestroyWindow(window)
    SDL_Quit()

imgui.text_colored("Parse Error: " + rule_error, 1, 0, 0, 1)
            imgui.pop_font()
            imgui.pop_text_wrap_pos()

        for n in to_delete:
            del DB.rules[n]
        to_delete = []

        if imgui.button("New Rule"):
            imgui.open_popup("new-rule")

        new_name = draw_ok_cancel_popup("new-rule", "New Rule Name:")
        if new_name:
            if len(new_name) > 0:
                DB.add_rule(new_name.lower().replace(" ", "_").replace("-", "_"))
        imgui.end()

imgui.end_group()

        
        imgui.end()

        if ERROR:
            imgui.set_next_window_size(width, height)
            imgui.set_next_window_position(0, 0)
            imgui.begin("ERROR", 
                flags=imgui.WINDOW_NO_RESIZE | imgui.WINDOW_NO_MOVE | imgui.WINDOW_NO_SAVED_SETTINGS
            )
            imgui.text(str(ERROR))
            if imgui.button("OK", width=200, height=60):
                ERROR = ""
            imgui.end()

        imgui.render()
        renderer.render()

    renderer.shutdown()

for name, value in DB.global_binds.items():
            const_expanded[name], closed = imgui.collapsing_header(name.replace("*", ""), True)
            if const_expanded[name]:
                imgui.indent()
                change = draw_eav_value(DB, "CONST", name, value)
                if change:
                    (_, _, new_val) = change
                    if new_val:
                        DB.global_binds[name] = new_val
                imgui.unindent()

        if imgui.button("New Constant"):
            imgui.open_popup("new-data")
        draw_data_popup(DB, True)
        imgui.end()

if auto_layout:
                imgui.set_next_window_size(width - 10, height - 10)
                imgui.set_next_window_centered()

            if auto_window:
                imgui.set_next_window_size(width - 10, height - 10)
                imgui.set_next_window_centered()
                # note: title may be unicode and since we are building docs on py27
                #       there is a need for encoding it.
                imgui.begin("Example: %s" % title.encode())

            exec(code, locals(), globals())

            if auto_window:
                imgui.end()

        # retrieve pixels from framebuffer and write to file
        pixels = gl.glReadPixels(0, 0, width, height, gl.GL_RGBA, gl.GL_UNSIGNED_BYTE)
        image = Image.frombytes('RGBA', (width, height), pixels)
        # note: glReadPixels returns lines "bottom to top" but PIL reads bytes
        #       top to bottom
        image = image.transpose(Image.FLIP_TOP_BOTTOM)
        image_list.append(image)

        gl.glBindFramebuffer(gl.GL_FRAMEBUFFER, offscreen_fb)

        gl.glClearColor(1, 1, 1, 0)
        gl.glClear(gl.GL_COLOR_BUFFER_BIT)

        imgui.render()

toggle_button_legend = "Hide " + window_param.window_title
    else:
        toggle_button_legend = "Show " + window_param.window_title

    if imgui.button(make_unique_label(toggle_button_legend)):
        this_window_open_status = not this_window_open_status

    if this_window_open_status:
        imgui.set_next_window_size(window_param.size[0], window_param.size[1])
        if window_param.include_begin_code:
            imgui.begin(window_param.window_title)

        window_function_code()

        if window_param.include_begin_code:
            imgui.end()