如何在PyViz中使用带有回调的切换按钮(在类中)？

import panel as pn
import param

class ToggleButton(param.Parameterized):
    toggle = param.Boolean(default=False, doc="Toggle button state")

    @param.depends('toggle')
    def toggle_callback(self):
        if self.toggle:
            # 执行切换按钮打开时的操作
            print("Toggle button is ON")
        else:
            # 执行切换按钮关闭时的操作
            print("Toggle button is OFF")

    def __init__(self):
        super().__init__()
        self.button = pn.widgets.Toggle(name='Toggle Button', value=False)
        self.button.param.watch(self.toggle_callback, 'value')

toggle_button = ToggleButton()
pn.Row(toggle_button.button)