如何在kivymd MDDialog框中创建多个按钮

from kivymd.app import MDApp
from kivymd.uix.dialog import MDDialog
from kivymd.uix.button import MDFlatButton

class MyApp(MDApp):
    def build(self):
        dialog = MDDialog(
            title="多按钮对话框示例",
            text="这是一个多按钮对话框示例",
            buttons=[
                MDFlatButton(
                    text="按钮1",
                    on_release=self.button1_callback
                ),
                MDFlatButton(
                    text="按钮2",
                    on_release=self.button2_callback
                ),
                MDFlatButton(
                    text="按钮3",
                    on_release=self.button3_callback
                )
            ]
        )
        dialog.open()

    def button1_callback(self, instance):
        # 处理按钮1点击事件的逻辑
        print("按钮1被点击了！")

    def button2_callback(self, instance):
        # 处理按钮2点击事件的逻辑
        print("按钮2被点击了！")

    def button3_callback(self, instance):
        # 处理按钮3点击事件的逻辑
        print("按钮3被点击了！")