Tk Treeview Focus()。如何获得多个选定的行？

import tkinter as tk
from tkinter import ttk

def get_selected_rows():
    selected_rows = tree.selection()
    print(selected_rows)

root = tk.Tk()

tree = ttk.Treeview(root)
tree["columns"] = ("Name", "Age")

tree.insert("", "end", text="1", values=("John Doe", "25"))
tree.insert("", "end", text="2", values=("Jane Smith", "30"))
tree.insert("", "end", text="3", values=("Bob Johnson", "35"))

tree.pack()

button = tk.Button(root, text="Get Selected Rows", command=get_selected_rows)
button.pack()

root.mainloop()